Five men arrested in Bolton on suspicion of rape or conspiracy to commit rape have been bailed until next January.
Officers from the Greater Manchester Police Serious Sexual Offences Unit coordinated the operation at various address across the town.
It follows allegations that a 15-year-old girl suffered numerous sexual assaults between 2011 and 2012.
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Officers are appealing for information from the public to help trace a missing Warrington man.
Samuel Brown has today been jailed for 18 months for sexual offenses against a 15-year-old girl.
Emergency services are treating the incident as a suspected gas explosion at the moment. Two people are believed to be seriously injured.