July 13 (Reuters) - Following are security developments in Iraq at 0830 GMT on Friday: * denotes new or updated items: * BAGHDAD - U.S. soldiers killed at least six Iraqi policemen and seven suspected militants during a dawn raid in east Baghdad on Friday to arrest an Iraqi police lieutenant accused of militant links, the U.S. military said. * BAGHDAD - Gunmen killed five Iraqi guards near a gate to the ministry of the interior in central Baghdad, police said. * SAMAWA - Two children were killed and six wounded by a roadside bomb near a bus station in the southern city of Samawa, police said. DOUR - Four Iraqi policemen and two soldiers were killed when gunmen attacked their checkpoint in Dour, a small town near the northern city of Tikrit, police said. BAGHDAD - Twenty eight bodies were found dumped in different parts of Baghdad on Thursday, police said. BAGHDAD - An Iraqi soldier was killed and two others wounded by a roadside bomb targeting their patrol in the east Baghdad neighbourhood of Dora, police said. MOSUL - One policeman was killed and eight other officers plus a civilian were wounded by a roadside bomb in the restive northern city of Mosul, police said. SAWAYRA - An Iraqi soldier was killed in a drive by shooting in the centre of Sawayra, a town 60 km (40 miles) south of Baghdad, police said. SAWAYRA - Three bodies bearing signs of torture were recovered from a river near Sawayra.