Seven police officers were hit with disciplinary charges Tuesday in the 50-shot slaying of an unarmed groom-to-be on his wedding day — a case that has sparked protests and raised questions about police firepower. If found guilty at an internal trial, the officers — including three shooters acquitted last month at a criminal trial and their supervisor — could be fired. A union official said Tuesday that they would fight the allegations. Police officials described the move as procedural, citing administrative guidelines requiring them to bring charges against officers within 18 months of the incident. The New York Police Department could take "further administrative steps" once the U.S. attorney's office in Brooklyn completes a review of the case, said NYPD spokesman Paul Browne. Federal prosecutors have declined to discuss possible civil rights charges. Sean Bell, 23, died in a hail of 50 bullets on Nov. 25, 2006, around the corner from a Queens topless bar where he had just had a bachelor party and where undercover police were investigating complaints of prostitution. Two of his friends were seriously wounded.