Police and school officials have been investigating a "kill list" of more than 20 students compiled by others at a western Pennsylvania elementary school.

Springdale police and Allegheny Valley School District officials say nobody was endangered, but they're nonetheless taking the list seriously.

Police believe the list was created by two sixth-grade girls at Colfax Upper Elementary School. That's about 15 miles northeast of Pittsburgh.

The investigation was continuing Wednesday and disciplinary action against the students was pending.