March 8 (Reuters) - Following are security developments in Iraq at 1300 GMT on Saturday.

* denotes new or updated items.

* KHALIS - Iraqi security forces discovered about 100 badly decomposed bodies in a mass grave near Khalis, 80 km (50 miles) north of Baghdad, the U.S. military said.

* HAWIJA - A roadside bomb killed a member of a neighbourhood security unit and wounded four others in Hawija, 70 km (45 miles) southwest of Kirkuk, police said.

* NEAR HILLA - Four people were killed and seven wounded when an Iraqi military vehicle collided with a minibus carrying religious pilgrims on the road between Hilla and Najaf south of Baghdad on Friday, police said.

BAGHDAD - Three bodies were found in different areas of Baghdad on Friday, police said.

BAQUBA - A roadside bomb killed three members of the same family, including a mother and daughter, and wounded two others near Baquba, 65 km (40 miles) north of Baghdad, police said.

BAQUBA - Two people were killed and eight wounded when a roadside bomb hit a minibus near Baquba, police said.

DIYALA - One U.S. soldier was killed and one injured by an explosion during operations on Friday in Diyala province northeast of Baghdad, the U.S. military said.

BAGHDAD - U.S. forces arrested seven members of a suspected Iranian-backed militia in operations south and north of Baghdad on Thursday and Friday, the U.S. military said.

BAGHDAD - U.S. soldiers arrested the suspected leader of an Iranian-backed militia in southwestern Baghdad's Rashid district on Wednesday, the U.S. military said.

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