Beloit police have three suspects in custody after what officers describe as a chase through a significant portion of the city.  Officials say the pursuit Thursday afternoon followed an armed robbery in Winnebago County, Illinois.  The chase ended shortly after the suspects crashed into several vehicles in the 300 block of West Grand Avenue.  Two people in one of the vehicles damaged needed to be taken to the hospital.  The suspects attempted to flee on foot, but were quickly taken into custody.