Bexar County Fire Marshal Craig Roberts confirms a man was killed Sunday morning on Kelly Road in Southwest Bexar County.
Investigators said a rescue truck from Emergency Services District No. 5 was responding to a call for a "man down" around 6 a.m. in the 11000 block of Kelly Road.
Apparently, the man was lying in the middle of the road and was run over by the rescue vehicle.
Conditions were extremely foggy at the time, Roberts said.
The victim was transported to San Antonio Military Medical Center, where he was pronounced dead.
The medical examiner says the man is in his 20s and is waiting on notification of next of kin before releasing his identity.