MIAMI, OK A fire extinguisher loaded with anhydrous ammonia exploded in a car Wednesday morning, sending two Missouri men and a woman to hospitals with burns, Ottawa County Sheriff Terry Durborow said.

Anhydrous ammonia can be used to make methamphetamine.

The explosion occurred in a moving car in southern Ottawa County around 4:15 a.m. near the junction of State Highways 10 and 60.

When authorities arrived they found the three had removed most of their clothing and their bodies appeared to be covered in chemical burns, Durborow said. Also strewn about the scene were several ingredients needed to manufacture methamphetamine, Durborow said.

The men, whose identities were not released, were flown to a Springfield, Mo., hospital. The woman was flown to a Joplin, Mo., hospital.