New Jersey State Police are still searching for the driver of a boat involved in a hit-and-run crash that left four people injured.

Officials released 911 calls made by one of the passengers who was hurt in the crash on Greenwood Lake in West Milford. Two couples were on board the boat when another boat crashed into them and fled the area.

The two men on board, who are in their 70s, were seriously injured. Their wives were also hurt, but not as badly. One victim remains in the hospital in critical condition.

A large reward is being offered for information leading to an arrest.