Aug 24 (Reuters) - Following are security developments in Iraq at 1100 GMT on Friday:

* Denotes are new or updated items

* BAGHDAD - At least 13 people were killed in clashes between U.S. forces and gunmen in the Shula district of northwestern Baghdad overnight, a police source at a hospital said. U.S. force said they killed eight militants in the clash.

* TARMIYA - U.S. forces said they killed seven militants and arrested four in a raid in the town of Tarmiya north of Baghdad.

* DIWANIYA - Gunmen killed two construction workers in a drive-by shooting in Diwaniya, 180 km (112 miles) south of Baghdad, police said.

* DIWANIYA - Police said they found a body riddled with the bullets in central Diwaniya.

* HAWIJA - Gunmen killed a barber in a drive-by shooting in central Hawija 70 km (43 miles) southwest of the northern city of Kirkuk, police said.

* HAWIJA - Police said they found a body with gunshot wounds and signs of torture in central Hawija.

SALAHUDDIN PROVINCE - One U.S. soldier was killed and four wounded as a result of an explosion that struck them while on patrol in Salahuddin Province north of Baghdad, the U.S. military said.

MOSUL - A booby-trapped parked car containing two dead bodies exploded in central Mosul on Thursday, police said. Two people including a policeman were killed in the blast and 12 were wounded.

RIYADH - Police found one body with gunshot wounds and signs of torture in the town of Riyadh 60 km (40 miles) southwest of Kirkuk on Thursday, police said.

NUMANIYA - Gunmen killed a policeman in Numaniya 120 km (72 miles) south of Baghdad, police said.

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