Patna, July 13 (IANS) One person was killed and two others injured in a crude bomb blast outside a court at Sasaram in Bihar on Wednesday, police said.

The preliminary investigation suggested that the bomb was placed by unidentified criminals inside a motorbike near the main gate of the court in Sasaram -- the headquarters of Rohtas district, a police official said.

The injured have been admitted to a hospital for treatment, police said. The security in courts across the state has been beefed up following the blast. Police have lodged a case in this connection and begun an investigation into it. In March this year, a bomb exploded in Sasaram court premises.