As of 1 am ET, at least one person has been arrested and three others are being questioned by police after 11 officers were shot in Downtown Dallas. The person in custody was involved in a shootout with police before being arrested. One man, who was initially identified as a person of interest in a photo released by police, turned himself in for questioning. Two others were questioned following a traffic stop south of downtown Dallas. Police initially said two snipers were involved in the shooting.