Several concert-goers were taken by ambulance to hospitals from a Keith Urban performance at Mansfield’s Xfinity Center Saturday night, according to a Mansfield Fire Department official. By about 10:30 p.m., at least eight ambulances from the town had transported fans, most of whom appeared to be suffering from alcohol-related issues, Deputy Fire Chief James Puleo said at the scene. Puleo could not confirm the number of people transported, and no further information was immediately available. Representatives for Live Nation, which owns the venue, could not be reached Saturday night. The concert was an early stop on Urban’s “Raise ’Em Up” tour, which runs through September.