A surgeon amputated a worker's leg to free him from a trenching machine after an accident Thursday morning in Frisco.

Frisco firefighters were called to the scene at about 9 a.m. and found the worker "entangled in the trenching blades of the machine," read a state from the Frisco Fire Department.

A surgeon was flown to the scene, where he amputated the man's leg. The patient was then flown to Medical City of Plano. As of 4:45 p.m., the worker's condition is unknown.

This is a developing report