MACAO - An explosion in a restaurant in Macao special administrative region, is believed to be caused by a gas leakage, its Fire Services Bureau said in a bulletin Tuesday.

According to the Fire Services Bureau, the explosion which has injured 13 people took place in a restaurant at 07:02 am.

The injured included five men and eight women, one of whom was trapped in the rubble and had to be saved by firemen.

Eight people, four men and four women aged between 41 to 65, were sent to Conde S Januario Hospital for treatment. One man required admission for observation.

The others who sustained glass cuts to their hands, legs and head, were treated at the scene.

The restaurant was located on the ground floor of "Centro Internacional de Macau" on Rua de Malaca.

The Fire Services Bureau utilised 16 emergency vehicles and more than 40 firemen in the operation.