At least seven police officers have been killed in an attack in the south-eastern Turkish city of Diyarbakir, CNN Turk reported.
The explosion - which injured 27 people, including 14 civilians - occurred Thursday in the Baglar district, near the bus terminal, as a police bus was driving past, according to the report, which added that three officers were in serious condition.
Turkey's mostly Kurdish south-east has seen renewed clashes with Kurdish militants since last July, when a two-year ceasefire with the Kurdistan Workers' Party (PKK) broke down.
The fighting has left hundreds dead, including civilians, and forced hundreds of thousands to flee their homes.
The Kurdistan Freedom Falcons (TAK), a PKK offshoot, claimed two recent car bomb attacks in the capital Ankara, which together killed more than 65 people.
The PKK has been fighting with the state for more than three decades.