Manchester investigation

This investigation into the Manchester bombing now spans two continents. Police arrested the father and a brother of suicide bomber Salmen Abedi in Libya and another brother in Manchester. Law enforcement teams are hunting for anyone else who may have been involved in the United Kingdom. Authorities are confident he had help carrying out Monday's attack. Investigators believe that Abedi, a British citizen, traveled to Syria recently and was in Libya days before taking a train to Manchester and detonating a powerful and sophisticated explosive.