HYDERABAD: Notorious snakegang members Faisal Dayyani and Ali Barakba were detained by the Cyberabad police under Preventive Detention (PD) Act on Tuesday. They were involved in four criminal cases in Pahadishareef police limits and were in jail and facing trial. Since there was a possibility of them getting a bail and indulging in criminal activities, the police invoked PD Act to maintain public order, said a release.