A car bomb blast near ruling AK party headquarters left at least 48 people, including two police officers, wounded in Turkey's southeastern city of Van on Monday.
The attack comes a day after the government suspended 28 mayors for being allegedly involved with Kurdistan Workers' Party (PKK), a group viewed by Turkey and its Western allies as a terrorist organisation.
Although no group has claimed responsibility for the attack, the Turkish government believes PKK to be behind the attack.
"The terrorist organisation (PKK) has targeted our party building and the (ruling party) AKP's presence in the past. This is one of them," Turkish lawmaker Besir Atalay told NTV, a private TV station.
"One of the police officers is in a critical condition," he further said, AFP reported.
Turkey has escalated its offensive against PKK militants in the southeast region of Turkey.
PKK, which seeks to form an independent state of Kurdistan, has been waging an armed struggle in Turkey since 1984.