(AP) — Authorities say they’ve arrested a Lincoln man suspected of groping or slapping the backsides of women jogging on city trails.

Twenty-seven-year-old Christopher Jackson faces at least three counts of third-degree sexual assault and one of misdemeanor assault. A Lancaster County jailer said Jackson remained in custody on Thursday. Online court records don’t list the name of Jackson’s attorney.

Lincoln police spokeswoman Katie Flood says three women had reported separate incidents in the past week. They said their attacker would ride up on a bicycle from behind them and would reach out to grab or slap their buttocks.

Officers say they found Jackson just west of the Rock Island Trail after an incident on Tuesday.

Flood says Jackson also is suspected in an attack on a woman running on a trail in February.