Gunmen in police uniforms have killed the brother of Iraqi Vice-President Tariq al-Hashimi in Baghdad.
Tariq al-Hashimi has lost three close relatives in the past year
Amer al-Hashimi, a major general in the Iraqi army, was at home in the Sulaikh district when the gunmen stormed into the house and shot him dead.
They arrived in 10 police cars, a police source said.
Tariq al-Hashimi's Iraqi Islamic Party is the largest Sunni Muslim bloc in parliament. Earlier this year another brother and his sister were murdered.
Iraq is currently gripped by insurgent violence and sectarian fighting between Sunni and Shia Muslims. The UN estimates about 100 people a day are killed, and assassinations of prominent figures are relatively common.
Gen Hashimi worked as a military adviser in the Iraqi presidency.
"They killed his guards, before killing him and abducting his son," a spokesmen for the IIP said.
Elsewhere, a suicide car bomb was reported in the northern city of Talafar, killing one policeman and wounding 12 people at a checkpoint.
The city - praised earlier this year by US President George W Bush as a model for a "free Iraq" - was the scene of a similar attack on Saturday, when 14 people were killed.