Two large explosions have hit an industrial area in the Chinese city of Tianjin, killing at least 17 people and injuring hundreds more.
Authorities also said they have lost contact with 36 firefighters at the scene, the Beijing News reported.
Nine firefighters were among the dead.
More than 400 people have been admitted to hospital, the official Xinhua news agency said.
The first explosion happened at around 11.30pm local time, state broadcaster China Central Television (CCTV) reported.
The explosion, believed to have involved a shipment of explosives, triggered a blast wave that could be felt miles away, CCTV said.
The second blast, which was much bigger than the first, happened about 30 seconds after the initial explosion.
The blasts sent huge fireballs into the air.
The initial explosion also triggered other blasts at nearby buildings, Xinhua said.
Reports say many of those were wounded by broken glass and stones....
The fire has been brought under control, CCTV reported, although it is still burning.
Tianjin, home to around 15 million people, is one of the biggest cities in China.