The Kurdistan Workers Party (PKK) militant group has claimed responsibility for a bomb attack on a police compound in the southeastern Turkish city of Diyarbakir, in which three people were killed.
A statement on a PKK website said its militants had planted more than 2.5 tonnes of explosives after tunnelling under the compound in Tuesday's attack, days before a referendum on expanding President Tayyip Erdogan's powers.
PKK is designated a terrorist organisation by Turkey, the European Union and the US.
