Turkish Prime Minister Ahmet Davutoglu has claimed that a person linked to a leftist extremist group is behind two attacks this week against Turkey's pro-Kurdish political party, which injured six people.

Davutoglu said Thursday a suspect previously arrested for links to the banned DHKP-C carried out Monday's bomb attacks on the People's Democratic Party offices in southern Turkey.

The suspect has not been named and is still at large.

A day earlier, Davutoglu had suggested that the Kurdish party and the nationalists were using the attacks in an unlikely "cooperation" to tarnish the ruling party. He argued that the two parties, which are on opposite ends of the political spectrum, had issued similar statements blaming the government.

Turkey holds general elections on June 7.