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Multiple blasts have taken place in the Turkish capital Ankara, in what is believed to have been a factory explosion.

Witnesses say the blasts resulted in several popping sounds and caused a number of injuries.

Reports from the city said the violent explosions caused panic with many people taking to social media fearing a coordinated attack.

Emergency services rushed onto the streets shortly after the blasts at about 1.30pm local time.

Military personal and firefighters were also deployed. Local police said they investigated but found no evidence of a coordinated attack.

The blast is thought to have happened in a factory producing dry ice. The local governor's office said five people had been seriously injured.

Witnesses say there was a smell of gas in the area.

The explosion was so loud it caused panic across the city, which has a population of 4 and a half million.

The city was targeted by ISIS militants in October when two bombs were detonated outside Ankara's main rail station.

A total of 102 people were killed and more than 400 injured.