The incident occurred in the restaurant at about 6:30 a.m. on Wednesday (22:30 GMT on Tuesday), according to a government statement. Firefighters, doctors, and law enforcement officers arrived rapidly at the scene. All victims were taken to nearby hospitals for medical treatment.
At the time of the explosion, a large number of people were indoors, as Chinese restaurants, canteens and small cafes serve breakfast dishes from 5:30 to 8:00 a.m.
A cause of the incident has not yet been established. An investigation is underway.