SAN FRANCISCO (AP) – Authorities say two pedestrians were hit by blow darts while walking across the Golden Gate Bridge.

The California Highway Patrol says an officer patrolling the bridge on bicycle was flagged down Friday by a man who had been hit in the leg.

The San Francisco Chronicle reports the 5-inch long dart had sunk about two inches into the man’s skin.

Officials say that as emergency personnel were speaking with the man, a woman approached them and said she too had been hit by a blow dart in the knee. Both were evaluated by paramedics and released at the scene.

The CHP says it has opened an investigation and that officers are looking for surveillance video of the attacks.

Copyright 2016 The Associated Press.