FACTBOX-Security developments in Iraq

(Reuters) - Following are security developments in Iraq at 1 p.m. BST on Tuesday.

* denotes new or updated item.

* DIYALA - A U.S. soldier was killed in Diyala province when an explosion hit his vehicle, U.S. forces said.

* KHALDIYA - A policeman was killed in Khalidiya, 80 km (50 miles) west of Baghdad, in a bomb attack targeting his police patrol.

* BAGHDAD - Iraqi special forces detained on Monday the leader of a militant cell who allegedly participated in bombings which destroyed several U.S. army vehicles and was linked to 10 rocket attacks on the Green Zone in Baghdad.

BAGHDAD - Two car bombs killed six people and wounded 20 in the Zayouna district of eastern Baghdad, police and hospital sources said.

HAWIJA - Hussein Ali Saleh, head of Hawija City Council, was wounded when a suicide car bomber targeted his convoy on a road near the town of Hawija, 70 km (40 miles) southwest of the city of Kirkuk, police said. Two of his guards were wounded.

MOSUL - A suicide bomber wearing an explosives belt blew himself up near a police colonel, wounding the officer and nine others in Mosul, 390 km (240 miles) north of Baghdad, police said.

BAGHDAD - The Iraqi army killed four insurgents and arrested 31 during the last 24 hours in different parts of Iraq, the Defence Ministry said.