The death toll from an 80-vehicle pileup on a Pennsylvania highway Monday has risen to six people, state police reported Wednesday.

Police also said 80 vehicles were involved in the crash — 39 commercial and 41 passenger vehicles — up from previous estimates of more than 50. The names of those who died have not been released. 

The crash occurred around 10:30 a.m. Monday as a snow squall — an intense, short-lived burst of heavy snowfall accompanied by gusty wind — blinded drivers and led to a fiery crash on Interstate 81 near Minersville, about 100 miles northwest of Philadelphia.

Police reopened the interstate just after midnight Wednesday, according to a tweet from Pennsylvania State Police spokesman David Beohm. The collision closed all lanes of I-81 north in Schuylkill County at the time and highway message boards were redirecting traffic.

Once all cars were cleared, construction work was done to the road before it was reopened.

The crash also injured 24 people, who were taken to hospitals. 

What is a snow squall? The weather phenomenon caused a whiteout in New York and Pennsylvania