The bus that slammed into an Illinois highway piller in a crash that killed one passenger and injured dozens of others was manufactured last year and passed a maintenance check days ago.

State police are investigating reports that a blown tire caused the double-decker Megabus to crash Thursday near Litchfield, about 55 miles northeast of St. Louis.

A 25-year-old passenger who died in the crash of a double-decker Megabus in Illinois was a native of India traveling to central Missouri.

Aditi R. Avhad was headed to Columbia, Mo., when the bus slammed into an interstate bridge support pillar Thursday near Litchfield. Dozens were sent to hospitals with injuries.

The bus was en-route to Kansas City from Chicago with planned stops in St Louis and Columbia.

Illinois State Trooper Brad Lemarr said he didn’t know where Avhad was seated on the bus, which was traveling between Chicago and Kansas City. The city in which she lived was also not immediately known.

Some hospital officials said early Friday they still were treating patients, though none were reporting any of the injuries to be life-threatening.

Troopers had reported that 38 people were taken to hospitals for injuries.