Firefighters use the scaling ladder to transport their colleagues rescued from the building which collapsed at around 10 pm, January 2, 2015. More than 15 firefighters are trapped in the building. Three of them have been confirmed dead. [Photo/CFP]

Of the deceased firefighters, the youngest was 18 years old and the oldest 22.

The firemen were buried by debris while trying to put out the fire, which burnt down the third floor of a market warehouse at the Beifangnanxun ceramics market at about 10 p.m.on Friday, burying firemen on the second floor, according to a Xinhua reporter at the scene.