Police were asking visitors to avoid an area near the Santa Monica 3rd Street Promenade Friday morning after a man came at an armed security guard with a knife and attempted to rob him.
Santa Monica police asked the public to avoid the area near 3rd Street Promenade and Arizona Avenue, a very popular tourist area near the beach, just after 11:15 a.m.
Santa Monica police said a man wearing a green hat and who had a tattoo on his neck approached an armed guard who was protecting an armored vehicle.
The man came at the guard with a knife, and the guard drew his weapon and fired three shots.
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It didn't appear that anyone was hit by the gunfire, but several people began posting to Twitter that they heard the commotion.
Police detained a man who appeared to have a neck tattoo and was wearing glasses shortly after 12 p.m.
It wasn't immediately clear how long normal activities would be affected by the investigation, but yellow tape still blocked off a stretch of the Promenade.