Saboteurs have bombed two oil pipelines transporting crude from north and eastern Iraq to Baghdad's Dora refinery, oil security officials said on Saturday.
Major Ali Mahmoud said National Guard forces were trying to extinguish a fire which damaged 150 metres (yards) of the Khana pipeline north-east of Baghdad. He said another bomb was found on Saturday along the same line and was safely defused.
An oil official said saboteurs on Friday blew up a section of another oil pipeline in Mashahdeh area, around 50 kms (31 miles) north of Baghdad. The pipeline feeds the same refinery which processes 110,000 barrels per day (bpd).
Insurgent attacks on Iraq's oil pipelines have disrupted refinery operations and cost the US-backed interim government billions of dollars, including lost oil export proceeds and around $200 million a month worth of refined product imports.
Saboteurs hit a section of the northern oil export network on Thursday. Oil officials said crude kept flowing normally through alternative pipelines to Turkey's Ceyhan port at 300,000 bpd.
Iraq exports another 1.6 million bpd through two southern offshore terminals in the Gulf and the flows there have been normal for around two months, the officials said.