OMAHA, Neb. (AP) — Omaha police have made three arrests in the shooting deaths of two teens and now say those deaths are not connected to a killing last month.

Police arrested a 15-year-old boy Friday on a charge of first-degree murder in Wednesday’s fatal shooting of 18-year-old James Star and 17-year-old Brandon Phelps. Police also arrested a 17-year-old boy on suspicion of conspiracy and of being an accessory. Both teens were taken to a juvenile holding center.

The Associated Press typically does not name juveniles charged with crimes.

Eighteen-year-old Warren Anderson was booked Friday into the Douglas County jail on an accessory count.

Investigators say Star and Phelps were shot in a black SUV that had been at the site of a fatal Nov. 28 shooting, but that the shootings weren’t related.