BEIJING — A State Council investigatory team has named 123 people, including five officials at ministerial level, as responsible for the Tianjin warehouse explosions in August that killed at least 165 people.

After five months of investigations, the team has concluded that the disaster was caused by ignition of hazardous materials, improperly or illegally stored at the site.

The fire first started in a container through auto-ignition of nitro-cotton, due to vaporization of the wetting agent during hot weather. The fire spread, igniting other chemicals, including ammonium nitrate.

Authorities are continuing the cleanup nearly six months after the explosions.