Censor.NET reports citing Hürriyet Daily News.
At least 28 people were killed and 61 others were injured in a bomb attack on Feb. 17 targeting shuttles carrying military personnel in the Turkish capital Ankara.
Deputy Prime Minister Numan Kurtulmuş said said the attack was carried out with a car bomb.
"We are facing simultaneous terror attacks, as if they were controlled by the same people, trying to intimidate Turkey," Kurtulmuş told reporters.
"We do not yet know the perpetrators of this attack," the deputy prime minister said, adding that seven prosecutors have been assigned to the case and those behind the attack will be found out as soon as possible.
"This attack did not only target our military personnel in those shuttles," Kurtulmuş said.
"This attack openly targets out entire nation, we condemn those who carried this attack, those who use them as tools, and those who give logistical, intelligence and even political support to such attacks."
Kurtulmuş called on the international community to stand by Turkey.
"I want everybody to know that some plain condemnations no more satisfy Turkey. Whatever they do, the terrorist organizations and the powers behind them will not be able to reach their targets."
Most of the injured are in good condition, Health Minister Mehmet Müezzinoğlu said.
The attack occurred in the center of the city, hundreds of meters away from the top military headquarters, parliament and prime minister's office.
"We are looking into details of the explosion," Turkish Prime Minister Ahmet Davutoğlu said.
The attack happened at a time when a high-level security meeting was being held at the Presidential Palace under President Recep Tayyip Erdoğan.