LifeStar airlifted one person to the hospital Sunday after a two-car crash that has shut down Route 20 at Day Street.
The person was flown to Hartford Hospital and their condition is unknown.
The call came in at about 4:15 p.m.
Traffic on Route 20 is being detoured from Simsbury Road to Barndoor Hills in the eastbound direction and Barndoor Hills to Simsbury Road in the westbound direction, according to Granby police on Twitter.
No further information was immediately available.