(KMZA)--Funeral services have been set for a St. Marys police officer who died unexpectedly while on duty Saturday.

According to an obituary, services for 45-year-old Mark Lamberson will be Tuesday morning at 10:00 at the St. Marys High School gymnasium.

A visitation will be held Monday evening from 5 to 7 at the Piper Funeral Home, in St. Marys.

Lamberson had served as an officer with the St. Marys Police Department since 2013. Prior to that, he worked for eight years with the Pottawatomie County Sheriff's Office.

Among survivors are his wife and two children.

The Kansas Bureau of Investigation is leading the investigation into the circumstances surrounding his death, but foul play is not suspected.