Lifestar is heading to Interstate 395 in Waterford after a worker cutting trees along the highway was injured in the neck by a chainsaw, state police said.
Judd Everhart, of the state Department of Transportation, said the worker is not with DOT, but was contracted to do tree work. His condition is not known.
The incident happened on the northbound side of the highway between exits 77 and 79.
State police received the call at 10:56 a.m. and troopers, along with emergency medical crews, are at the scene.
Lt. Paul Vance, of Connecticut State Police, said the highway is open, but travel is being affected.
Lifestar will be landing nearby, but not on the highway.
No additional information was available.