Police said the incident occurred when some unidentified people threw grenades at the ceremony, where a large number of people had gathered to celebrate, Xinhua news agency reported.

Police said that the attackers fled from the spot after the attack.

The injured people have been admitted to a nearby hospital, out of which the condition of three is critical. Police have cordoned off the area and investigation is underway.

No group or individual has yet claimed responsibility for the attack.