May 11 (Reuters) - Following are security developments in Iraq at 1930 GMT on Friday:

* denotes new or updated item.

* BAGHDAD - Suicide truck bombers struck Iraqi police checkpoints on two bridges in a Shi'ite area south of Baghdad, killing 22 people and badly damaging one of the bridges. Police said 60 people were wounded.

* TAIJI - A truck bomb hit a bridge near the town of Taji on the main highway connecting the capital with cities in the north, an Iraqi army source said, adding the attack was followed by a car bomb that killed four Iraqi army soldiers there.

BAGHDAD - A U.S. soldier was killed and two others were wounded when a roadside bomb hit their vehicle in eastern Baghdad on Thursday, the U.S. military said.

TIKRIT - One U.S. soldier was killed and nine were wounded by an explosion on Thursday during combat operations in Diyala province, north of Baghdad, the U.S. military said.

DIWANIYA - A U.S. soldier was killed on Thursday when his patrol came under small-arms fire in Diwaniya, 180 km (112 miles) south of Baghdad, the U.S. military said.

BAGHDAD - A U.S. soldier was killed by small-arms fire on Thursday in southern Baghdad, the U.S. military said.

BAGHDAD - U.S. troops killed four militants suspected of involvement in car bomb networks, including one believed to have links to senior al Qaeda in Iraq leaders in a series of raids in and around Baghdad and in the northern city of Mosul over the past two days, the U.S. military. Nine militants were detained.

ZAAFARANIYA - A mortar bomb killed two people and wounded four when it hit a market in Zaafaraniya district in southern Baghdad on Thursday, police said.

BAGHDAD - Police said they found 20 bullet-riddled bodies in different districts of Baghdad on Thursday.

MOSUL - Police found six bodies on Thursday in different districts in Mosul, north of Baghdad, police said.

BAGHDAD - Two mortar bombs killed two people and wounded one in southern Baghdad's Doura district on Thursday, police said.

DIWANIYA - A roadside bomb targeting a police patrol wounded five policemen and three other people on Thursday in Diwaniya, police said.

KIRKUK - Police said they found an unidentified bullet-riddled body bearing signs of torture on Friday in Hawija, 70 km (43 miles) southwest of Kirkuk.

KIRKUK - Gunmen killed one civilian in a drive-by shooting in Kirkuk, police said.

FALLUJA - U.S. forces killed several insurgents and destroyed three trucks with mounted anti-aircraft weapons on Tuesday near Karmah in western Iraq, the U.S. military said.

FALLUJA - Gunmen killed the deputy mayor of Falluja's municipal council in a drive-by shooting, police said.

BAGHDAD - U.S. forces found a large cache of mortar rounds in western Baghdad on Wednesday, the U.S. military said.

AlertNet news is provided by