Eight former members of the Vienna Boys Choir have called an abuse hot line set up by the choir to report that they were sexually abused while they were members of the group, according to Tina Breckwoldt, who is overseeing the hot line. The choir opened the hot line after a local newspaper reported last week that two former choir members claimed that they had been sexually abused while in the choir decades ago. The callers who made the claims, which included accusations of sexual and physical abuse, ranged in age from 33 to 72, Mrs. Breckwoldt said. Some of the alleged perpetrators may have been boys in the choir at the time, she said. The eight calls had been received as of Wednesday. In an open letter on its Web site, the Vienna Boys Choir said that any abuse constituted “an injustice that we deeply regret.”