Photos: BASF explosion in Germany

A dark cloud of smoke rises from the compound of the BASF company in Ludwigshafen, Germany on October 17, 2016.

An aerial view taken with a drone shows emergency services fighting a fire at the BASF plant site in Ludwigshafen, Germany on October 17, 2016.

A huge cloud of dark smoke clouds bellows above a fire behind a police block at the BASF chemical plant site in Ludwigshafen, Germany on October 17, 2016.

Emergency workers are fighting to extinguish a fire at the BASF plant site in Ludwigshafen, Germany on October 17, 2016.

Dark smoke and fire rises from a facility belonging to chemical firm BASF in Ludwigshafen, southwestern Germany, on Oct. 17, 2016.

Smoke and fire rise from a facility belonging to chemical firm BASF in Ludwigshafen, southwestern Germany, Monday Oct. 17, 2016.

Smoke rises from the Chemical plant of the BASF site in Ludwigshafen, Germany on October 17, 2016.

A long column of smoke rises from the Chemical plant of the BASF site in Ludwigshafen, Germany on October 17, 2016.

Smoke rising from the chemical plant of the BASF site in Ludwigshafen, Germany, on October 17, 2016.