China detains Tianjin officials and managers after explosions

Senior managers from the company which owns the Tianjin warehouse where explosions killed 139 people are among 23 criminally detained, state media said.

Police had investigated executives from Ruihai International Logistics immediately after the blast on 12 August.

The explosions were caused by hazardous materials stored in the warehouse.

The blast sparked concerns about the storage of dangerous chemicals.