FACTBOX: Security developments in Iraq, April 23

(Reuters) - Following are security developments in Iraq at 2:30 p.m. EDT on Wednesday.

BAGHDAD - The U.S. military reported the following engagements in Shi'ite areas of eastern Baghdad overnight.

-- U.S. troops were attacked with rocket-propelled grenades after a roadside bomb exploded in eastern Baghdad. Soldiers returned fire, killing six gunmen.

-- An unmanned drone spotted two militants putting a mortar tube into a vehicle and then driving off in northeastern Baghdad. The drone fired a Hellfire missile, killing the two.

-- Soldiers saw a militant planting a roadside bomb in northeastern Baghdad. Soldiers shot and killed the militant.

-- Soldiers killed one militant after coming under small-arms fire in northeastern Baghdad.

-- Soldiers were attacked with rocket-propelled grenades in eastern Baghdad. Soldiers identified two separate RPG teams and retuned fire, killing five.

BAGHDAD - The Imam Ali hospital in Sadr City, eastern Baghdad, said it received five dead bodies riddled with shrapnel and bullets overnight. It said 22 other people had been wounded.

* MOSUL - The U.S. military said it killed one suspected al Qaeda militant and arrested five in Mosul in northern Iraq.

* MAHMUDIYA - Three dead bodies were found in Mahmudiya, south of Baghdad. One was decapitated, police said.

* MOSUL - Gunmen opened fire on a private car in Mosul, killing a man and wounding his wife.

MOSUL - Two coordinated attacks killed four people including an off-duty soldier and wounded nine civilians in the northern city of Mosul, police said. The first attack was caused by a suicide bomber wearing an explosive belt while the second was a parked car that exploded while police and ambulance workers were at the scene of the first blast.

MOSUL - A policeman was killed in clashes between gunmen and police in western Mosul, police said.

MOSUL - Iraqi police found three bodies in different areas of Mosul on Tuesday, police said.

TIKRIT - Iraqi police found two bodies near oil pipelines close to Tikrit, 175 km (110 miles) north of Baghdad. They said the dead were guards of the pipeline facility, police said.

(Compiled by Khalid Al-Ansary, Editing by Dean Yates)