A San Antonio man is in critical but stable condition after he was rescued by a police officer after being doused in gasoline and set ablaze.

Richard Rodriguez suffered the most severe burns on the lower half of his body before he was rushed to the hospital late Saturday night. The 22-year-old was able to tell police his name and that he was attacked by several men, though he was unaware of the exact number, MySanAntonio.com reported.

A motive for the attack is not yet clear.

An officer patrolling the area near downtown San Antonio where the attack took place noticed the flames, and as he got closer he realized that it was a man on fire, according to Lt. Matthew Podwika. The officer was able to use a fire extinguisher to put out the flames.

Rodriguez is recovering in the intensive care unit at San Antonio Military Medical Center, while police are reportedly questioning residents of a nearby apartment complex in a search for potential witnesses.