TUCSON, Ariz. (AP) — A suspect has been arrested in connection with a double homicide in Tucson last week, police said Monday.

They said 19-year-old Raul Corrales turned himself in to police on Sunday.

After being interviewed, police said Corrales was booked into the Pima County jail on suspicion of two counts of first-degree murder with additional charges possible added at a later time.

Police didn’t disclose a possible motive for the double homicide and it was unclear Monday in Corrales has lawyer yet.

They said 21-year-old Manaury Acevedo was found mortally wounded Friday night on midtown Tucson street near a stopped SUV and 20-year-old Javier Araiza Lugo was found fatally shot in an alley as officers canvassed the neighborhood for evidence.

A handgun was found near Acevada and detectives determined that he and Lugo were both in the SUV when the shooting occurred.