A Border Police officer is suspected of shooting his friend to death and then taking his own life inside a residential building in Petah Tikvah on Wednesday night.Police said they arrived at the murder scene on Yehoshua Ben Nun Street in the city after receiving a call from a civilian who reported hearing gunshots. They said they have yet to determine a motive for the shooting.Magen David Adom paramedic Roi Engel said that just before 6p.m. they received a call about two men lying unconscious inside a building in the city. When they arrived they found two men – both Ethiopian Israelis in their thirties - already deceased, and ruled both of them dead at the scene.ZAKA first responder Haim Otmozgin said that his team found the two victims lying dead in the stairwell of the building. He added that the crime scene “was a difficult one” for the body collecting team.Also in the Central District, on Monday night one man was killed and two others lightly wounded by a masked gunman who opened fire on them outside a kiosk in Lod.