Policemen killed in Afghan blasts

At least seven policemen have been killed in two suicide attacks in Afghanistan, officials say.

Police said a bomber wearing police uniform blew himself up near the main police building in Lashkar Gah, the capital of southern Helmand province.

The policemen were exercising in the yard at the time of the blast. The attack left six people dead.

Another policeman was killed in an attack in the south-western province of Farah, officials said.

Southern Afghanistan has been the centre of a Taleban-led insurgency since the US-led invasion in 2001.