SAN DIMAS (CBS) — Officials will try to recreate a boating accident on a reservoir that killed three women.

Anesia Bautista, 59,  Aurora Yeso, 59, and Mari-Con Yeso, 34, were all riding a jet ski when it crashed into a 21-foot powerboat at Frank G. Bonelli Regional Park Saturday. Four people on board the boat were injured.

The park was closed Monday as two dozen divers searched the Puddingstone Lake for a clues and a video camera that may have recorded a boat collision.

“What they are trying to do is recover any debris and evaluate the environmental conditions,” said Hugo Maldonaldo.

Authorities say it’s still unclear who was at fault in the crash.  It is unclear if the driver of the jet ski was drinking.