PITTSBURGH (AP)Pittsburgh Steelers running back Najee Harris did not practice on Wednesday, two days after sustaining an abdominal injury in a win over Indianapolis.

Harris went down late in the first half in a 24-17 victory over the Colts and did not return. Coach Mike Tomlin said Tuesday he didn’t have specifics on the nature of Harris’ injury, but said it was likely Harris would miss at least some portion of practice during the week.

Harris struggled early in the season, but has come on of late, picking up three touchdowns in his past two games.

The Steelers (4-7) play at Atlanta (5-6) on Sunday.

While Harris’ status is uncertain, primary backup Jaylen Warren should return after sitting out last week with a hamstring injury. Warren, an undrafted rookie free agent, practiced on Wednesday.

Wide receiver Miles Boykin, a special teams ace who missed last week with an oblique injury, also practiced.

Linebacker T.J. Watt (ribs), safety Minkah Fitzpatrick (ribs), linebacker Robert Spillane (oblique), linebacker Myles Jack (knee), center Mason Cole (foot) and defensive lineman Larry Ogunjobi (toe) were limited Wednesday.

AP NFL: https://apnews.com/hub/nfl and https://twitter.com/AP-NFL