SAN ANTONIO — A 51-year-old man was hospitalized in critical condition after police say a medical episode caused him to crash his vehicle into a concrete shoulder.

The crash happened just before 5 p.m. Saturday in the 800 block of Nolan Street off of I-37.

According to San Antonio police, the man was traveling westbound on Nolan when he suffered a medical episode. His vehicle left the roadway and struck a concrete shoulder.

He was transported to a local hospital with life threatening injuries. At last check, he was reported to be in stable condition, police said.

No other injuries were reported.