At least 30 people were killed on Saturday when two explosions rocked a road junction in the centre of the Turkish capital Ankara ahead of a peace rally, the media reported.
The explosions occurred near the main train station of the city where People’s Democratic Party supporters were gathering to hold the rally to protest the conflict between the state and outlawed Kurdistan Workers’ Party fighters in southeast Turkey, Hurriyet Daily News reported.
The death toll was confirmed by Turkey’s interior ministry.
State-run Anadolu Agency reported that it could be a suicide bomber.
According to Dogan News Agency, the blasts took place several minutes apart, with the first going off at around 10.00 a.m. local time.
A video on social media showed the moment of one explosion, young people were dancing and waving banners as a massive fireball erupted.
The rally was organised by labour unions and a number of non-governmental organisations.
Organisers have cancelled the rally, calling on participants to return.
The cause of the blast was not immediately known.
Lami Ozgen, head of the Confederation of Public Sector Trade Unions said, “There was a massacre in the middle of Ankara. Two bombs exploded in very short intervals.”
Prime Minister of Turkey Ahmet Davutoglu called an emergency security meeting to discuss the attack.
Local resident Emre told the BBC that he heard two separate explosions and saw a number of dead bodies. Angry people tried to attack police cars, he said.
An HDP rally in the city of Diyarbakir was bombed in June, ahead of general elections in which the party entered parliament for the first time.
In July, a suicide bombing by suspected Islamic State militants on a gathering of Socialist youth activists in the town of Suruc on the Syrian border killed at least 30 people.
A ceasefire between the Kurdish militant group the PKK and Turkey’s government later broke down, and there have been regular attacks from both sides since then.