"The evidence points to Daesh", he said using another name for the Islamic State.
"The clean-up operations are continuing," he was quoted as saying by the state-run Anadolu news agency.
Turkish Prime Minister Binali Yildirim said he believes the attacker will be found soon.
Those killed include 41 police officers, 47 civilians, 2 soldiers, 104 coup plotters.
World leaders are reacting with caution to Donald Trump's jaw-dropping victory in the US presidential election, with some of them reminding him of the democratic values and the global responsibility he carries.