A man believed to be in his 50s was killed and 10 others were injured when a pleasure boat crashed and sank in Long Beach Wednesday night.

Today authorities are investigating the circumstances surrounding the crash, but they believe the boat was traveling at high speed when it hit the exterior side of the west jetty protecting the entrance to Alamitos Bay.

The 48-foot boat hit the rocks at around 9:20 p.m., according to the LBFD. There were 11 people on board, according to authorities.

The Long Beach Fire Department said this boat sank after crashing into a jetty in Long Beach. Photo courtesy the LBFD.

Some of the people were rescued from the water after the boat sank.

One man died at the scene. The 10 others were taken to local hospitals where three were in critical condition, according to the LBFD.

Investigators are still working to determine exactly how fast the boat was traveling and if any other conditions factored into the crash, LBFD Capt. Jack Crabtree said.

The speed limit in Alamitos Bay and the channel leading to it is 5 miles per hour.

Editor’s note: This story has been updated with more information from the LBFD.

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City News Service and staff writer Jeremiah Dobruck contributed to this report.