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Ukraine mounts onslaught to secure Malaysia Airlines Flight 17 crash site

More fighting is breaking out in eastern Ukraine, preventing outsiders from reaching the crash site of Malaysia Airlines Flight 17
At site of MH17 crash, fighting stalls recovery effort 01:12

DONETSK, Ukraine - Ukrainian armed forces mounted a major onslaught against pro-Russian separatist fighters Sunday in an attempt to gain control over the area where Malaysia Airlines Flight 17 was downed earlier this month.

Ukraine's foreign minister calls for "bilateral cease-fire" 04:43

Just as the onslaught was launched, Ukrainian Foreign Minister Pavlo Klimkin, appearing on CBS' "Face the Nation," said his government is eager for a bilateral cease-fire.

"We are for (a) peaceful settlement," Klimkin said. "But we can't negotiate directly with terrorists who shot down the plane, who have been killing people, taking hostages...The main leaders of the terrorists are Russian citizens with different connections with Russian special services."

Reports of the intensifying unrest prompted a postponement of a trip to the site by a team of Dutch and Australian police officers who had planned to started searching for evidence and the remaining bodies.

In the Netherlands, Prime Minister Mark Rutte said his government has rejected the idea of deploying armed troops to secure the crash site because there is no way they could achieve "military superiority" in a region where heavily armed pro-Russian rebels are battling Ukrainian government forces.

"The option we looked at was a military option in which you could secure the area so you can work in a stable environment," Rutte said. But "that the option would be such a provocation to the separatists that it could destabilize the situation."

U.S. officials: Russia has fired into Ukraine 02:01

The U.S. State Department released satellite images that it says back up its claims that rockets have been fired from Russia into eastern Ukraine and heavy artillery for separatists has also crossed the border.

A four-page document released by the State Department seems to show blast marks from where rockets were launched and craters where they landed. Officials said the images, sourced from the U.S. Director of National Intelligence, show heavy weapons fired between July 21 and July 26 - after the July 17 downing of Malaysia Airlines Flight 17.

Ukraine's National Security Council said Sunday that government troops have encircled Horlivka, a key rebel stronghold, and that there had been fighting in other cities in the east. Horlivka lies around 20 miles north of the main rebel-held city of Donetsk.

The armed forces "have increased assaults on territory held by pro-Russian mercenaries, destroyed checkpoints and positions and moved very close to Horlivka," the council said in a statement.

A representative of the separatist military command in Donetsk confirmed that there had been fighting in Horlivka, but said that rebel fighters were holding their positions.

Elsewhere, Russian state news agency RIA Novosti reported Sunday that a column of Ukrainian armored personnel carriers, trucks and tanks had entered the town of Shakhtarsk, 10 miles west of the site of the Boeing 777 crash.

Shakhtarsk is a strategic town in the area. By controlling the town, the Ukrainian army would cut off vital rebel supply lines.

Local media reported fighting also taking place in the towns of Snizhne and Torez, the two nearest mid-sized towns to the crash site.

The government accused rebel forces of firing rockets Sunday on residential apartment blocks in Horlivka in what they said was an attempt to discredit the army and whip up anti-government sentiment. The separatist self-declared "Donetsk People's Republic" has accused the army of being responsible for that and other rocket attacks in nearby cities.

The Donetsk regional government - which is loyal to Kiev and based elsewhere since rebels took over the area - said Sunday in a statement that at least 13 people, including two children aged 1 and 5, were killed in fighting in Horlivka. It said another five people were killed as a result of clashes in a suburb north of Donetsk.

New York-based Human Rights Watch last week condemned what it said was the Ukrainian government forces' practice of using unguided rockets in populated urban areas. It said that use of the rockets was a violation of international humanitarian law that "may amount to war crimes."

Malaysian Airlines Flight 17 was shot down with a surface-to-air missile over a part of eastern Ukraine controlled by pro-Russian separatists on July 17, killing all 298 people on board. U.S. and Ukrainian officials say it was shot down by a missile from rebel territory, most likely by mistake.

Malaysia Airlines black box data reveal "massive explosive decompression" 02:17

Unreleased data from a black box retrieved from the wreckage of Malaysia Airlines Flight 17 inUkraine show findings consistent with the plane's fuselage being hit multiple times by shrapnel from a missile explosion.

"It did what it was designed to do, bring down airplanes," a European air safety official told CBS News.

The official described the finding as "massive explosive decompression."

If the full teams of aviation crash experts and security personnel ever do arrive at the crash site in Grabovo, it will be a relief to the handful who are already there.

The dedicated but small group of Dutch, Australian and Malaysian investigators has been on the crash site for the past few days and has learned that there's a lot more work to be done to find hard evidence of the cause of the crash.

They are also still making more grisly discoveries.

"Personal belongings, passports, ID cards, credit cards, things like that," Michael Borkiurkiw of the OSCE said, "and the Dutch have just documented some very small human remains over there in that field as well."

Around a hundred passengers are still unaccounted for.

Ten days after the disaster, a full-fledged investigation still has not begun at the crash site, with some bodies still unrecovered and the site forensically compromised. Concerns about the integrity of the site were raised further when a couple that had flown from their home in Perth, Australia, visited the site Saturday outside the village of Hrabove and even sat on part of the plane's wreckage.

It remained unclear when the forensic experts from the Netherlands and Australia would be able to begin their work at the site.

Alexander Hug, the deputy head of a monitoring team from the Organization for Security and Cooperation in Europe, said it was too dangerous for the unarmed officers to travel there from their current location in Donetsk.

"We reassess the situation continuously and we will start to redeploy tomorrow morning back to the site if the situation changes," Hug said.

Australian Prime Minister Tony Abbott had said earlier Sunday that unarmed Australian police would be part of the Dutch-led police force to secure the area and help recover victims' remains.

Abbott said that by using unarmed police, Ukraine's parliament won't need to ratify the deployment as it would if the security force were to be armed.

Dutch mourn arrival of more Malaysia Airlines Flight 17 victims' bodies 02:25

Malaysian Prime Minister Najib Razak said in a statement that his country would send dozens of police and that his country had received assurances from pro-Russia separatists that they would provide protection for investigators.

Flights from Ukraine to the Netherlands have taken 227 coffins containing victims of the plane disaster. Officials say the exact number of people held in the coffins still needs to be determined by forensic experts in the Netherlands.

The Malaysia Airlines disaster prompted some expectations in the West that Russia would scale back its involvement in the uprising in Ukraine's east, but the opposite seems to be the case.

In addition to producing evidence that rockets have been fired into Ukraine from Russia, the U.S. has said it has seen powerful rocket systems moving closer to the border.

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