FACTBOX: Security developments in Iraq, March 19

(Reuters) - Following are security developments in Iraq at 1800 GMT on Wednesday.

* denotes new or updated item.

* DIYALA - One U.S. soldier was killed in what the U.S. military said was a "vehicle rollover" in Diyala province north of Baghdad.

* KERBALA - The bodies of two Iraqi security guards were found in Kerbala, 110 km (70 miles) south of Baghdad, police said.

KIRKUK PROVINCE - U.S. forces mistakenly killed three policemen and wounded another after their vehicle drove at high speed into a cordoned-off area in Kirkuk province, the U.S. military said in a statement.

MOSUL - A suicide car bomber wounded 11 Iraqi soldiers and three civilians in an attack on an army checkpoint in Mosul, 390 km (240 miles) north of Baghdad, police said.

ISKANDARIYA - One policeman was killed and two others wounded by a roadside bomb in the town of Iskandariya, 40 km (25 miles) south of Baghdad, on Tuesday, police said.

BAGHDAD - A car bomb killed a police colonel and wounded one other person in central Baghdad's Karrada district, police said.

BAGHDAD - Gunmen killed the owner of a money exchange and wounded another employee in Karrada, police said. The gunmen also stole $115,000.

TIKRIT - One member of a neighborhood security unit was killed and two others wounded when gunmen attacked a checkpoint in the city of Tikrit, 175 km (105 miles) north of Baghdad, police said.

BAGHDAD - Three neighborhood security unit members and a civilian when militants threw a hand grenade at a checkpoint in Baghdad, police said.

BALAD RUZ - A female suicide bomber killed four people, including two policemen, and wounded 12 others in the town of Balad Ruz, about 70 km (45 miles) northeast of Baghdad, in Diyala province, police said.

MUSSAYAB - Militants set fire to a fuel pipeline supplying a power station in the town of Mussayab, about 60 km (40 miles) south of Baghdad, police said.

BAGHDAD - The bodies of five people were found in different districts of Baghdad on Tuesday, police said.

BAIJI - The bodies of two men with gunshot wounds were found in the city of Baiji, 180 km (110 miles) north of Baghdad, on Tuesday, police said.

BASRA - Gunmen seriously wounded an aide of Grand Ayatollah Ali al-Sistani, Iraq's top Shi'ite cleric, in Basra, 550 km (340 miles) southeast of Baghdad, on Tuesday, police said.

BAGHDAD - U.S. forces killed two suspected al Qaeda insurgents and detained 23 others during operations in central and northern Iraq on Tuesday, the U.S. military said.

ISKANDARIYA - A roadside bomb killed a woman and wounded two others in the town of Iskandariya.

QANDIL MOUNTAINS - Iran shelled Iraq's northern Qandil mountains, targeting PJAK Kurdish separatist guerrillas, but there were no casualties or any damage to property, said Azad Wassu, a local mayor in the area.