Four people are now dead after a crash Sunday night in Frostproof in which an unknown second car may have been involved.

Around 10:15 p.m., Reginald Burnett Jr., 29, of Avon Park lost control of his Dodge sedan on southbound U.S. 27 between County Road 630-A and U.S. 98, the Polk County Sheriff's Office said.

The Dodge left the road, struck a concrete culvert and came to rest in a drainage ditch.

First responders found two passengers dead: Doyle Lane Jr., 38, of Frostproof and Ryan Lamar Dawson, 28, of Eustis.

Burnett and another passenger, Micah Lamar Watson, 33, of Frostproof were airlifted to Lakeland Regional Health where Watson later died.  Burnett died Monday, police said.

Police say it's possible a 1990s black Honda with a light-colored left-front fender may have been in the area. The car would have been heading south on U.S. 27. Anyone with information about this vehicle is asked to call Deputy Sheriff Johnnie Wombles at 863-297-1109.