Updated

A 21-year-old autistic man vanished Sunday after completing the Los Angeles Marathon, police said.

Romario Snow was last seen in Santa Monica near the finish line at about 2 p.m. Police said he was photographed at the beginning of the race wearing a navy blue running shirt. He could be wearing a light brown sweater, police said.

The Los Angeles Times reported that Snow has the mental capacity of a 10-year-old. He once went missing in 2014 in downtown L.A. and was found three weeks later in Venice.

Authorities are asking the public with knowledge of his whereabouts to contact the Santa Monica police at (310) 458-8491.