Photo by Alexander Nguyen

A 28-year-old man who was riding a scooter suffered life-threatening injuries when he fell on his head in downtown San Diego, authorities said Sunday.

The crash occurred while he was riding a Bird Scooter at 11:20 p.m. Saturday, going southbound on Seventh Avenue, crossing F Street, the San Diego Police Department reported.

He was attempting to go up on the sidewalk and instead hit the curb, police said.

Paramedics rushed the man to an area hospital with life-threatening injuries.