The Islamic State is the prime suspect for the bombing in the Turkish capital that killed nearly 100 people on Saturday, Turkish Prime Minister Ahmet Davutoglu says.

No group has claimed responsibility for the attack, which targeted a group of peace activists near Ankara Central rail station with two blasts. However, Davutoglu claims that authorities are close to identifying one of the suicide bombers.

At least 97 people were killed in the attack, with scores more left injured.

The activists had planned to rally for an end to the escalating violence between the Turkish authorities and the militant Kurdistan Workers’ Party (PKK).

Many of the victims members of the pro-Kurdish HDP party, and the group says it is now considering cancelling all future rallies for safety concerns.

HDP leader Selahattin Demirtas blamed the bombing on elements within the Turkish state, and claimed that Turkey was using IS as a scapegoat for an attack carried out to instil fear in those that oppose President Recep Tayyip Erdogan’s governing AK Party.

HDP gained its first seats in the Turkish parliament in the recent June election, which left the AK Party without a ruling majority, and forcing another vote on 1 November.

Following the bombing, the PKK unilaterally declared a ceasefire, but the offer was rejected by the Turkish government, which continued its air strikes on PKK positions within southern Turkey and Iraq on Sunday.