Three people, including an undertrial criminal, were killed in a shootout at Hazaribagh court premises in Jharkhand on Tuesday, police said.A police constable was also seriously injured in the incident, police said adding that the yet unidentified assailants used an AK-47 gun which has been recovered from the scene.The deceased have been identified as Sushil Srivastav, a criminal who was to be presented in court for a case hearing, and Gayas Khan and Kalam.A police constable Devendra Paswan, who was accompanying them, also received bullet injuries."The attackers fled from the spot abandoning their vehicle when police retaliated," a police official told IANS."Jharkhand is witnessing murders, robberies and other crimes and the state government is claiming that the situation is under control," said Alok Dubey, a Congress leader.Chief Minister Raghubar Das has, however, taken the incident seriously and directed the police to nab the assailants involved in the incident, officials here said.