Lost Chihuahua Mix in SF - Help Find Him!

He escaped from his harness and ran down a busy street in the Marina District in San Francisco CA. We believe someone picked him up thinking that he was a stray. He is a small brown and black chihuahua mix who has brindle like coloring on his coat, much like black “tiger” stripes. He has a white muzzle and is starting to get more white on his eyebrows and chest too. He has long hind legs and is neutered.