Granby police are looking for the driver who hit two bicyclists around noon on Sunday and fled.
Fredrika Ballard, 42, and Joanne Nelson, 51, both of Southwick, Massachusetts, were riding bicycles on Day Street in the area of Creamery Hill on Sunday when a vehicle hit them, police said.
They were transported by ground ambulance to Baystate Medical Center to be treated for serious injuries.
Ballard was treated and released and Nelson was admitted with non-life threatening injuries, according to police.
Police are looking for the driver and the vehicle, which is described as an older dark green SUV in poor condition, possibly a late 1990s model Chevrolet Blazer.
Police said on Monday afternoon that there are reports it had an external spare tire mounted to the back of the vehicle with a tan tire cover.
The passenger in the front seat was described as a heavyset woman with blonde hair.
Anyone with information is asked to call Granby Police at 860-844-5335.