U.S. military says helicopter has gone down in Iraq; security operation gets under way

(AP) A Sea Knight helicopter went down northwest of Baghdad on Wednesday, the military said, the fifth helicopter lost in Iraq in just over two weeks.

The CH-46 helicopter went down about 20 miles northwest of the capital, U.S. military spokesman Maj. Gen. William Caldwell said, but he declined to comment on casualties.

"A quick reaction force is on site and the investigation is going on as we speak," he said in Baghdad, without giving a cause for the crash. "It would probably be inappropriate for me to talk about whether or not there are or are not casualties."

Caldwell also said the long-awaited Baghdad security operation "is ongoing as we speak," a day after Iraqi Prime Minister Nouri al-Maliki acknowledged that the plan to pacify the violence-ridden capital had been slow to start and had allowed insurgents time to step up attacks that have killed hundreds of Iraqis in recent weeks.

The Iraqi officer who is leading the security drive, Lt. Gen. Abboud Gambar, took over the operation headquarters on Monday, but there had been no announcement until Wednesday that the sweep, the third attempt to crush violence in nine months, had begun.

"The implementation of the prime minister's plan has already begun and will be fully implemented at a later date, having all the parts and pieces that he wants," Caldwell said. "But portions are already being put in place, and we'll continue to put more into place as the forces arrive and the assets become available."

President Bush is increasing the number of U.S. troops in Iraq by 21,500, including 17,500 for Baghdad, as part of the efforts. But the series of helicopter crashes underscores the dangers facing U.S. troops as they step up their presence in the Baghdad area.

Witnesses said the helicopter had been shot down in a field in the Sheik Amir area northwest of Baghdad, sending smoke rising from the scene, in a Sunni-dominated area between the Taji air base, 12 miles north of Baghdad, and Karmah, 50 miles west of the capital.

"The helicopter was flying and passed over us, then we heard the firing of a missile," said Mohammad al-Janabi, a farmer who was speaking less than a half-mile from the wreckage. "The helicopter then turned into a ball of fire. It flew in a circle twice, then it went down."

The helicopter went down five days after a U.S. Army helicopter crashed in a hail of gunfire north of Baghdad, police and witnesses said. The U.S. command said two crew members were killed in that crash, and the al-Qaida-affiliated group the Islamic State of Iraq claimed responsibility.

Three other helicopters also have gone down since Jan. 20, killing a total of 19 Americans _ 14 troops and five civilian security contractors.

The twin-rotor CH-46 is used by the Marines primarily as a cargo and troop transport, and can carry 25 combat-loaded troops, according to the think tank GlobalSecurity.org.

More American troops were killed in combat in Iraq in the past four months _ at least 334 through Jan. 31 _ than in any comparable stretch since the war began, according to an Associated Press analysis of casualty records, as U.S. soldiers and Marines find themselves fighting more battles in the streets of Baghdad, as well as other cities.

The Iraqi government also has faced increased pressure over delays in starting the operation as hundreds of Iraqis have been killed in bombings and other violence in recent weeks.

At least 15 people were killed in attacks nationwide on Wednesday, including two employees of the government-funded Iraqi Media Network in Baghdad and a female government official who was shot to death while she was riding to work with her husband in the northern city of Mosul.

Al-Maliki acknowledged Tuesday that the Baghdad security operation was off to a slow start, but he also reassured Iraqis that security forces will live up to their responsibilities, telling his commanders they must not disappoint those "who stand beside us."

New checkpoints were erected and increased vehicle inspections and foot patrols were reported in some neighborhoods _ providing the main evidence so far that U.S. and Iraqi forces were gearing up for a major neighborhood-to-neighborhood sweep to quell sectarian violence in the city of 6 million.

"The operations will unite us and we will take action soon, God willing, even though I believe we've been very late and this delay has started to give a negative message," al-Maliki said in a meeting with military commanders shown on state TV. "I hope that more efforts will be exerted and more speed exerted in carrying out and achieving all the preparations to start the operations."

"I say again, we have talked much about the operations, and while the Iraqis are waiting and waiting, the terrorists in turn have raised the level of the bombing operations and started killing people in mass numbers," he added. "Our slogan should be 'rest is prohibited, especially for military men, and day and night should merge in working to achieve victory.'"

"We should carry out the operation in good time and should not delay, because the delay will be used against us by the enemies ... and those who are afraid of them," he said.

Defense Secretary Robert Gates said the increase in U.S. forces in Iraq is "not the last chance" to succeed and conceded he was considering what steps to take if the buildup fails.

"I would be irresponsible if I weren't thinking about what the alternatives might be," he told the Senate Armed Services Committee.

Gates said the operation was to have started Monday. "It's probably going to slip a few days, and it's probably going to be a rolling implementation," he said.

"As far as the security issue is concerned, we should be determined and committed. We should carry out the operation on time and should not delay because the delay will be used against us by our enemies," he added.