Baghdad, Jun 6 (AP) A suicide bomber in the northern city of Tikrit and gunmen in the Iraqi capital killed a total of seven people this morning, Iraqi officials said.

Iraqi security officials said four people died after gunmen in speeding vehicles opened fire on two security checkpoints in Baghdad.

The incidents happened early this morning in the mostly Sunni neighbourhood of Azamiyah, said a military and a medical official.

At one checkpoint, an Iraqi army soldier was killed when gunmen using weapons affixed with silencers opened fire. At about the same time, gunmen opened fire on a checkpoint manned by members of an anti-al-Qaeda militia.

Three militia members were killed in that incident, said the officials, speaking on condition of anonymity because they were not authorised to speak to the media.