Police arrested 15 boys on Sunday morning for questioning on suspicion of raping a 15-year-old girl, a resident of northern Israel, in several different incidents. An undercover investigation was opened following a complaint filed about a month ago, on suspicion of committing serious sexual offenses. According to the findings of the investigation, some of the detainees will be brought in the next few hours for a hearing on the extension of their detention at the Magistrate's Court in Nazareth.