A gas explosion in western Iran injured over 200 people late Friday, state media reported.

The “chlorine gas explosion” injured 217 people in a village in the western province of Ilam, the official IRNA news agency reported, citing the head of the province’s medical university Mohammad Karimian.

“Carelessness and negligence” of a driver of a trailer carrying gas capsules led to the explosion, IRNA said. No deaths have been reported.

Karimian said that all of Ilam’s hospitals had raised their readiness levels to treat the wounded.

Iran witnessed a series of explosions and fires between June and July, some of which occurred at or near military, nuclear and industrial facilities.