Kurdish militants on Thursday claimed a suicide bombing in Ankara that killed 37 people this week and warned of further attacks, while Germany shut down its diplomatic missions and schools in Turkey.
The Kurdistan Freedom Hawks (TAK), linked to militants who have waged a three-decade insurgency against Turkey, said they carried out Sunday's bombing and vowed further strikes to avenge military operations in the largely Kurdish southeast.
Berlin closed its embassy in Ankara, consulate in Istanbul and German schools in both cities, citing "concrete and very serious" indications of terror attacks being prepared against its properties. It was not clear if the threat to German interests also came from Kurdish militants.
"We have hundreds of members ready to conduct suicide attacks," TAK said in a statement on its website, describing Sunday's bombing as revenge for military operations in the southeast, where hundreds of people including civilians, soldiers, police and militants have been killed since July.
It is the second suicide bombing in a month in the heart of Ankara claimed by TAK, opening a dangerous new phase in Turkey's war with Kurdish militants as deadly attacks spread to its biggest cities well beyond the southeast.