Updated

Officials in Pennsylvania say two teenage girls who were struck and killed by a high-speed Amtrak train committed suicide.

An Acela train traveling from Boston to Washington, D.C., hit the 10th-graders about 10:30 a.m. Thursday in Norwood, about 10 miles southwest of Philadelphia.

The Delaware County Medical Examiner's Office said Saturday that autopsies concluded the deaths were suicides.

Norwood Police Chief Mark DelVecchio says an examination of the girls' e-mail and text messages showed they spoke of their desire to end their lives. He said police did not know what led the girls to suicide.

Family members and classmates at Interboro Senior High School said 16-year-old Gina Gentile and 15-year-old Vanessa Dorwart were upset about the death of Gentile's boyfriend. Seventeen-year-old William Bradley was killed by a car while riding his bicycle last month.