MORRILTON, Ark. (AP) – An Arkansas sheriff said three children drowned after the car they were in went into a lake.

Conway County Sheriff Mike Smith said the children’s mother was driving the car when it went into Brewer Lake near Morrilton just after 3:30 a.m. Sunday. Smith said the children were ages 2, 7 and 8.

Arkansas State Police investigators and sheriff’s deputies questioned the 26-year-old mother. She had not been arrested or charged as of Sunday afternoon.

Morrilton is about 35 miles west of Little Rock. A series of strong thunderstorms and fog rolled through the area around the time of the crash.