An ammonia leak from a commercial freezer inside a warehouse in Moreno Valley sent four people to a hospital Wednesday evening.
Paramedics responded about 9 p.m. to the 22000 block of Goldencrest Drive, where they discovered the leak and the four people harmed by the colorless gas, according to the Riverside County Fire Department.
Those patients were taken to a hospital for treatment of minor medical complaints, the department said.
The cause of the leak was under investigation.