Explosion Rocks Chemicals Site in Western German City of Leverkusen, 5 Missing, Several Injured

An explosion at an industrial park for chemical companies shook the German city of Leverkusen on Tuesday, sending a large black cloud rising into the air. Five people were reported missing and several injured at least two seriously.

Germany’s Federal Office for Civil Protection and Disaster Assistance classified the explosion as “an extreme threat” and asked residents to stay inside and keep windows and doors closed, German news agency dpa reported.

Operators of the Chempark site in Leverkusen, about 20 kilometers (13 miles) north of Cologne on the Rhine river, said the cause of the explosion was unclear.

They said on Twitter that firefighters and pollution detection vans had been deployed.

Police in nearby Cologne said they did not have any information on the cause or size of the explosion and were not aware of any injuries at this point, but that a large number of police and ambulances had been deployed to the scene. They asked all residents to stay inside and warned people from outside of Leverkusen to avoid the region.

They also shut down several nearby major highways.

Daily Koelner Stadt-Anzeiger reported that the explosion took place in the Buerrig neighborhood at a garbage incineration plant of the chemical park.

The paper reported that the smoke cloud was moving in a northwestern direction toward the towns of Burscheid and Leichlingen. It said firefighters from all over the region had been called in to help extinguish the fire.

Leverkusen is home to Bayer, one of Germany’s biggest chemical companies. It has about 163,000 residents and borders Cologne, which is Germany’s fourth biggest city and has around 1 million inhabitants. Many residents work at Bayer, which is one of the biggest employers in the region.

The scene of the explosion, the chemical park, is located very close to the banks of the Rhine river.