Police were called to South Belfast Avenue Monday after a man riding an all-terrain vehicle died following an apparent medical problem.

The incident took place around 1:30 p.m. on Togus Pond about 100 yards off Route 105, which also is known as South Belfast Avenue.

Police and rescue responded, but the man was pronounced dead at the scene. Police said there is nothing suspicious about the death, and it was not the result of a crash.

The man was riding an ATV and carrying fishing gear.

Police remained at the scene for more than an hour.