A man was seriously injured Friday by a stump grinder while working at a home in Dix Hills.
Rubiel Cordoso Chavez was working for Traditional Tree Service when the incident happened.
Police say Chavez slipped and lost his balance, causing his leg to become entangled in a stump grinder.
The 33-year-old was airlifted to Stony Brook University Hospital.
Suffolk police say they are investigating the incident.