The blasts caused a number of casualties and spread panic across the city, which was targeted by Islamic State militants in October when bombings killed more than 100 people.
Emergency services were alerted to the explosions, which happened at 12.20pm local time.
The incident was thought to have occurred at a factory producing dry ice, with some suggesting it had been triggered by a gas explosion following reports of a smell of gas in the area.
Local officials said five people were seriously injured.
Turkish troops were deployed to the scene along with firefighters and police, but investigators found no evidence of a coordinated attack.