At least 27 people were killed and 75 others injured in a strong explosion that hit the Turkish capital Ankara on Sunday, the governor's office said.
The blast took place in Kizilay district in the heart of Ankara at 18:35 local time, according to a statement.
Private news broadcaster NTV said a bomb-loaded car exploded near bus stops where many people were present. A number of vehicles, including a bus carrying passengers, were set on fire near Guven Park, a major transportation hub. The wounded were rushed to 10 different hospitals for medical treatment, Xinhua reported.
Witnesses said smoke could be seen rising above the area from a distance, and square Kizilay has been closed fearing a possible second explosion.
Turkey's TV watchdog has declared a broadcasting ban on images of the scene and victims.
Earlier on Friday the US embassy in Ankara warned its citizens over a potential terror attack against "government buildings and housing located in the Bahcelievler area" in the Turkish capital.
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This is the third major blast in the Turkish capital since last October.
On October 10, 2015, alleged Islamic State (IS) militants bombed a peace rally near Ankara Railway Station near a major city thoroughfare, killing at least 103 people.
On February 17, a suicide car bomb targeted military shuttles in the capital city, killing at least 29 people and injuring 81 others.