(CNN) -- One person was killed and five injured when a U.S. Coast Guard patrol boat collided with a recreational vessel at a boat festival in San Diego, California, officials said.

San Diego Fire-Rescue Department officials received a call that a 33-foot patrol boat was involved in an accident about 6 p.m. PT (9 p.m. ET), said Lt. Josh Nelson of the Coast Guard.

"A total of 13 people were on board on both vessels, and all people are accounted for," said Maurice Luque, a spokesman for the Fire-Rescue Department.

It was unclear whether the recreational vessel was part of the parade.

Investigators are double-checking to make sure everyone is accounted for, the Coast Guard said.

At least one of those injured was a child, according to Nelson.

People decorate their vessels with Christmas lights and parade up and down the bay as part of the annual San Diego Bay Parade of Lights.

"The Coast Guard vessels are normally there to ensure safety for the event," Luque said.

CNN's Summer Suleiman contributed to this report.