LONDON -- British police have found the bodies of two men after a blaze at a fireworks warehouse that sent plumes of black smoke and explosions into the sky.

A 53-year-old man was arrested Friday in connection with the fire, but was later released without charge.

The Staffordshire Police force says officers and fire officials are investigating the cause of the fire that also sent two people to hospital.

Fifty firefighters spent several hours tackling the blaze late Thursday at the SP Plastics building in Stafford, central England.

Two men were taken to a local hospital, one with a back injury and another with serious burns.