Turkey's government has raised the death toll to 97 from the bombing of a weekend peace rally. One Palestinian was reported to be among the dead.

Turkish authorities say police have detained four suspected Islamic State militants in a raid in the southern city of Adana. It was not clear where the arrests, announced Monday, were linked to the suicide bombings at a rally promoting peace with the Kurdish rebels.

No one has claimed responsibility, but the attack bears similarities to a suicide bombing the government blames on the Islamic State group that killed 33 people at a town bordering Syria in July.