A more than 30-vehicle pileup on a snowy Indiana interstate left at least 10 people injured Thursday, including at least one critically, and shut down a heavily traveled highway for most of the evening, authorities said.

Most of the injuries in the afternoon pileup along Interstate 70 were minor, but one victim's condition was "very critical," Indiana State Police Sgt. Rich Myers said.

Indiana University Health spokesman Gene Ford said five of the injured had been treated and released by Thursday evening. He said four others were stable condition, while one was in critical condition.

Semitrailers sat smashed side-by-side against one another along the stretch about 20 miles west of Indianapolis, with cars and other smaller vehicles pushed to the sides of the roadway. About 20 big rigs and some 15 passenger vehicles were involved in the pileup, Indiana State Police Capt. Dave Bursten said.

Several motorists blinded by a snowsquall crashed into stalled traffic on the slick road, police said.