FACTBOX - Security developments in Iraq

(Reuters) - Following are security developments in Iraq at 6 p.m. British time on Wednesday:

* Denotes new or updated item:

* BAGHDAD - Gunmen killed at least 11 people when they locked them inside a house in the town of Garma west of Baghdad and then blew it up, the U.S. military said. A spokesman said it may have been a "vendetta attack" against the owner who is involved with the provincial security forces.

* BAGHDAD - Police found 200 suicide belts and packs of explosives on a truck that had entered Iraq from neighbouring Syria, the Interior Ministry said. The truck had been stopped along the Syrian-Iraqi border.

BAGHDAD - Police said they found 30 bodies on the streets of Baghdad, victims of sectarian death squads. They said eight bodies were found in the Sunni district of Doura alone.

BAGHDAD - U.S. and Iraqi forces killed 20 suspected al Qaeda in Iraq militants in a two-day operation north of Baghdad this week, the U.S. military said.

BAGHDAD - The U.S. military said eight suspected militants were killed during raids in eastern Baghdad on Monday.

GARMA - At least seven members of one family were killed when gunmen broke into their house in Garma, west of Baghdad, and planted explosives inside and blew it up, police said.

SAMARRA - The mayor of Samarra, a mainly Sunni city 100 km (62 miles) north of Baghdad, was shot dead, police said.