FARGO, N.D. – Police today were investigating the death of a Minnesotan man who jumped from roof where he was shoveling snow and was then buried by more snow that fell on top of him. Police said recuers dug frantically to free Christopher Volk, 19, of Glyndon, Minn., after a co-worker reported the incident about 2:15 p.m. Thursday. Firefighters eventually took Volk to Fargo’s MeritCare hospital, where he was pronounced dead. It took the rescue workers about 30 minutes to dig Volk out of the snow, Police Sgt. Julie Hinkel said. Police said Volk was buried by “several cubic yards of snow” that slid off the roof. Hinkel said officers reported the snow on top of Volk was “about the height of a standard doorway.” Police said Volk worked for Command Center, a temporary job agency, and was clearing snow at the Reiles Transfer building near the Fargo airport. An autopsy was planned Friday in Bismarck.