BAGHDAD ( CNN ) -- Three Iraq boys were killed in an airstrike in eastern Baghdad on Saturday as they were sifting through trash , looking for stuff to sell , said a 10-year-old boy wounded in the attack . Ambulances sit damaged after a U.S. attack Saturday near Baghdad 's Al-Sadr Hospital . `` I was hit by an American helicopter , '' Ahmed Yahya said . `` I was with a group of about 10 children who were collecting empty soft drink cans in Jamila . We have n't done anything . '' U.S. military officials confirmed firing two Hellfire missiles at a rooftop in the vicinity about the same time that the boy said the attack took place . However , they say the only damage U.S. forces saw was to the rooftop . Another boy said his brother died in the attack . Dr. Jawad al-Mousawi , chief doctor at Imam Ali hospital in Sadr City , said the hospital received the bodies of three boys and a wounded boy about 2 p.m . He said the hospital saw three other fatalities and treated 23 wounded people from airstrikes and fighting across the city . An ambulance driver at the hospital said it took three hours to transport the boys because of fighting in the area . Elsewhere in Baghdad , U.S. soldiers killed five suspected militants and detained 24 others in fighting Friday and Saturday in the city 's southern Rashid district . Earlier Saturday at least 28 people were wounded in a U.S. attack on a building near a hospital in Baghdad 's sprawling Sadr City area , an Iraqi Interior Ministry official said . Employees of al-Sadr Hospital were among the wounded , and the facility 's property sustained damage , including to some ambulances , the official said . In a statement , the U.S. military said the strike targeted `` known criminal elements . '' `` We did hit the target , which was a criminal command and control center , which was near a hospital , '' the military said , adding that it was assessing damages . Watch scenes of damage near the hospital » . The Interior Ministry official called the attack an airstrike , but the U.S. military said it was a guided multiple-launch rocket system strike . These guided rockets are launched from armored vehicles . Al-Sadr Hospital is one of the two main medical facilities in the district , where Iraqi and U.S. troops have been battling Shiite militias loyal to radical Shiite cleric Muqtada al-Sadr . The strike left a large hole in the ground near the hospital , video footage showed . Chunks of concrete and other rubble covered the ground , and car windows were shattered . The southern portion of Sadr City has been walled off so that U.S. military and Iraqi security forces can control movements there . Other developments . • Four U.S. Marines were killed Saturday when their vehicle struck a roadside bomb in Iraq 's al Anbar Province , the military said . Their names were withheld pending notification of their families . • Turkey 's military said Saturday that it had killed more than 150 Kurdish rebels in northern Iraq in an operation that ended early Friday , according to a statement on the military 's Web site . Turkey has been staging attacks against rebels with the PKK , or Kurdistan Workers ' Party , in the Qandil Mountain region in northern Iraq . A PKK official said Friday there were no party casualties . • A roadside bomb exploded Saturday at a traffic patrol in the western part of Baghdad , killing an Iraqi traffic police officer and wounding eight others , including six traffic police officers , a ministry official said . • Overnight , six people were killed and 25 were wounded in Sadr City , the Interior Ministry said . The U.S. military said it killed six `` criminals . '' On Friday , U.S. forces killed eight suspected militants during 10 hours of fighting in the Shiite neighborhood , a military statement said . • A U.S. soldier on combat patrol in eastern Baghdad was killed Friday when a roadside bomb struck the soldier 's vehicle , the military said . The number of U.S. military deaths in the Iraq war stands at 4,066 , including eight Defense Department contractors . E-mail to a friend .
NEW : Boys were among a group sifting through trash looking for stuff to sell . Guided rockets hit target of `` known criminal elements , '' U.S. says . Turkish military says it killed At least 28 Iraqi rebels in northern U.S. . 150 people wounded in Iraq attack near hospital , Iraqi says .