Man rescued from collapsed San Francisco pier

Firefighters rescued a man who fell into the water and was trapped beneath a collapsed dock near San Francisco's Pier 90 on Friday morning, the fire department said. 

Witnesses started calling 911 around 6:07 a.m. when they heard a person yelling for help in the water, the fire department said. 

The man was rescued from the bay by swimmers around 6:27 a.m.

The man is expected to be okay, the fire department said. 

There was no information about what caused the dock near Amador Street to collapse.