FACTBOX-Security developments in Iraq

(Reuters) - Following are security developments in Iraq at 3:30 p.m. EDT on Friday.

* denotes new or updated item.

BASRA - At least 120 "enemy" fighters have been killed in a four-day-old Iraqi military operation against Shi'ite militias in the southern oil hub of Basra, said Major-General Ali Zaidan, commander of Iraqi ground forces in the operation.

* BAGHDAD - U.S. forces killed 13 insurgents during engagements across Baghdad, the U.S. military said.

* BAGHDAD - A U.S. helicopter fired a hellfire missile at gunmen firing from the roof of a building, killing four of them, in Sadr City, a U.S. military spokesman said. Police said 12 people were killed and 60 wounded in several U.S. air strikes on Sadr City.

* BAGHDAD - Seven bodies were found in Baghdad on Friday, police said.

* MAHMUDIYA - Seven people were killed and 15 others wounded in clashes between Mehdi Army fighters and Iraqi security forces in Mahmudiya, 30 km (20 miles) south of Baghdad, police said.

BAGHDAD - U.S. forces killed 27 insurgents during operations in different parts of Baghdad on Thursday, the U.S. military said.

* NUMANIYA - An Army Colonel, Jabar Rashid, was killed in clashes with Mehdi Army fighters in Numaniya, 120 km (72 miles) south of Baghdad, police said.