Fairfax County Police Chief Edwin C. Roessler Jr. was injured Saturday during a scuffle inside his church with a person who apparently has a mental illness, county police said.

Two people suffered stab wounds that were not considered life threatening, police said. The chief was not stabbed, but scratched and perhaps bitten as he helped to subdue the suspect, police said.

He was taken to a hospital for examination.

The incident happened about 3 p.m. in Grace Covenant Church, a large house of worship in Chantilly, where the chief was present as a member of the congregation, police said.