FACTBOX - Security developments in Iraq, May 22

(Reuters) - Following are security developments in Iraq at 4:15 p.m. British time on Tuesday:

* denotes new or updated item.

BAGHDAD - At least 25 people were killed and 60 wounded when a car bomb exploded near a popular market in the Amil district in southwestern Baghdad, police said.

* BAGHDAD - At least eight college students were killed and three wounded when gunmen opened fire on their minibus in northern Baghdad, police said.

NEAR BAQUBA - Gunmen wearing Iraqi army uniforms at a fake checkpoint killed a family of six, including four children, in a town near Baquba, 65 km (40 miles) north of Baghdad, police said.

BAGHDAD - At least four college students were killed and 25 wounded in a mortar attack at Ibn al-Haitham college in Adhamiya district in northern Baghdad, police said.

RIYADH - The bodies of two Arbil airport employees were found shot and tortured in the town of Riyadh, 60 km (40 miles) southwest of Kirkuk, police said.

BAGHDAD - U.S. forces detained 15 suspected insurgents, including two alleged insurgent cell leaders, during raids around Iraq targeting al Qaeda, the U.S. military said.

NEAR GARMA - U.S. forces killed nine insurgents in a ground and air attack and freed 12 hostages held near the town of Garma, about 50 km (35 miles) west of Baghdad, the U.S. military said.