A car bomb has exploded in the Turkish capital Ankara, killing 27 people and wounding another 75, the city governor's office has said.
Several vehicles at the scene were reduced to burned-out wrecks, including at least one bus.
Last month, a bomb attack on a military convoy in Ankara killed 28 people and wounded dozens more.
The Hurriyet newspaper said the latest blast happened at about 18:41 (16:41 GMT) and the area was evacuated in case of a second attack. Many ambulances were at the scene, it added.
No group has yet claimed the attack.
Prime Minister Ahmet Davutoglu was reported to be convening an emergency security meeting.
President Recep Tayyip Erdogan, who has been in Istanbul, was briefed on the attack by the interior minister, Hurriyet reported. Mr Erdogan was expected to return to Ankara later.
Read more: Turkey explosion: Ankara car bomb kills at least 27 - BBC News