A Connecticut charter bus accident on Interstate 95 during a snowstorm has left at least 30 people injured, including six critically.

The state Department of Transportation says the accident happened at around 12:30 p.m. Monday in Madison.

A Yale-New Haven Hospital spokesman says hospital officials were told to expect 30 patients, six of whom were listed in critical condition.

State police say 55 passengers were on the Dahlia tour bus.

Video from near the scene showed the bus on its side off the right shoulder of the highway surrounded by numerous emergency vehicles. Authorities closed the northbound side of the interstate in Madison.

The accident occurred during a storm that was expected to drop up to a foot of snow on parts of the state.

(AP / Photo via FOX61)