By Shereen Siewert

UPDATED: One person is dead after a single vehicle crash Monday in Knowlton, according to the Marathon County Sheriff’s Department.

Crews responded at about 3:20 p.m. to a report of a rollover at CTX X and Camp Road with one occupant in the vehicle. The adult driver died at the scene, police said.

The man’s name is being withheld pending notification of relatives. Police plan to release his identity on Tuesday.

The crash is under investigation. See the initial story below.

Crews responded Monday afternoon to a single vehicle rollover southeast of Mosinee in which one person appears to have suffered serious injuries.

The crash was discovered by a passer-by who did not witness the actual crash at about 3:20 p.m. Monday near the intersection of CTH X and Camp Road.

A medical helicopter was initially headed to the scene but was called off. There’s no official word yet on the driver’s condition or what led to the crash.

This is a developing story that will be updated as additional information is received.