The number of detainees held across Turkey in connection with Wednesday’s bomb attack in Ankara has risen to 21.
PKK-affiliated terrorists exploded a device in the Turkish capital Wednesday near several military vehicles, killing at least 28 people and injuring dozens more.
According to sources from the Ankara Chief Public Prosecutor's Office, two more provinces Sakarya and Duzce were added to the list of locations being probed, bringing the total number up to 10 late Friday, while the number of suspects apprehended rose to 21.
As interrogations continue, the sources said they found evidence revealing links between the suspects and the PKK terrorist organization.
Prosecutors from the Bureau of Crimes Against Constitutional Order are also taking statements at Ankara Anti-Terror Police Department.
In remarks made to the media at the Turkish General Staff headquarters Thursday, Turkish Prime Minister Ahmet Davutoglu said that the attack was carried out jointly by a Syrian-national YPG member and PKK members based in Turkey.
The YPG is the armed wing of the PYD, which is the Syrian branch of the terrorist PKK group.
On Thursday, Turkish Interior Minister Efkan Ala announced that at least 14 people suspected of being linked to the attack had been detained in simultaneous operations carried out in eight provinces: Istanbul, Adana, Bolu, Tekirdag, Izmir, Ankara, Diyarbakir and Gaziantep.
Anti-terror police in Izmir said they apprehended four suspects after finding out that the vehicle apparently used in the attack was rented out in the western province.
A fake driving license and credit card were used to obtain the car, which had false license plates at the time of the explosion.
Four people working for the rental company in Karabaglar district have been taken into custody.
Company officials told police that they had reported a sport compact car stolen on Jan. 11 after the renter did not return it.
Another four suspects were apprehended in Istanbul later Thursday. They reportedly told police that they sold the rental car -- after changing the license plates -- to another individual in Diyarbakir.