The European Union has agreed to expand its mission against Somali pirates, by allowing military forces to attack land targets as well as those at sea. In a two year-extension of its mission, EU defence ministers agreed warships could attack boats and fuel dumps. The BBC's security correspondent Frank Gardner says the move is a significant step-up in operations, but one that also risks escalation. Several EU naval ships are currently on patrol off the Horn of Africa. They police shipping routes and protect humanitarian aid. The EU says the main tasks of the mission are the protection of vessels of the World Food Programme delivering food aid to displaced people in Somalia, and the fight against piracy off the Somali coast.