BBC News reports three Turkish soldiers have been killed in an attack on a convoy in the south-east by PKK (Kurdistan Workers Party) militants, the army says. Drones, helicopter gunships and commando units have been deployed to strike PKK positions, it said. Thursday's attack is the latest in an upsurge in violence, which began last week. Prior to that, there had been a two-year ceasefire between the two sides. The government says PKK attacks on Turkey have made peace attempts impossible. At the same time as launching attacks against the PKK in Iraq, the Turkish military also began air strikes against Islamic State (IS) targets in Syria.