West Springfield, Pennsylvania: Six Indian nationals who were on their way to visit Niagara Falls were killed when their minivan spun out of control and was hit by an oncoming car on a Pennsylvania highway, police said on Sunday.

Four of those killed worked at the Troy, Michigan-based Syntel Inc, an information technology company, and two were spouses of employees, company spokesman Jonathan James said on Sunday.

The minivan had just crossed the Pennsylvania-Ohio border on Saturday afternoon when it crossed the highway median and began flipping and rolling, coming to rest on its roof, authorities said.

It was then struck by an oncoming westbound car, whose driver was treated at a hospital and released on Saturday night, said state police Cpl Kevin Havern.

The minivan driver Kaushik Deb, 26, of Troy, Michigan, in suburban Detroit died on impact. The passengers killed were Manoj Jharia, 35; Mili Jharia, 28; Nitin Agarwal, 29; Swati Agarwal, 25; and Shubham Choudory, 24. The Jharias and Agarwals were married, police said.