Search crews continued to search for two small children believed to have drowned Sunday morning when the car in which they were riding plummeted into the Mississippi River in Tunica County.

A body believed to be the car’s driver, Symphony Wilson, was located late Monday, but rescue divers did not find the children.

WMC-TV reports Tunica County Sheriff K.C. Hamp confirms the body of 29-year-old Wilson was found late Monday night. Hamp says crews resumed their search Tuesday morning in an effort to locate the 2-year-old boy and 5-year-old girl with Wilson. The children were not Wilson’s, but were the children of Wilson’s friend.

Hamp says Wilson, of Tunica, dropped friends off at work Sunday shortly before the SUV went off a road and into the river.

Hamp says he believes it was an accident.

Investigators say the search for the children faces a number of challenges: the river is full of debris and the current is strong.