Suspected Kurdish guerrillas set off a remote controlled bomb on Friday as a convoy of the police chief of an eastern city was passing, local media reported.
The police chief and his entourage survived the attack in the eastern city of Tunceli unharmed, CNN-Turk and NTV televisions reported.
"We hope the level of cooperation from the United States against the guerrillas will increase," Foreign Minister Abdullah Gul said. "It is not at the desired level right now."
"We have the right to expect help from the United States in Iraq against the guerrillas," he said.
On the second day of the St. Petersburg International Economic Forum, a plenary meeting was held, in which Russian President Vladimir Putin, French President Emmanuel Macron, Japanese Prime Minister Shinzo Abe, Chinese Vice President Wang Qishan and IMF head Christine Lagarde took part