A man was killed and six others injured, one of them seriously, in a bomb blast inside an advocate's chamber in the district court premises in Ara on Friday.

Bhojpur police superintendent Sunil Kumar said the crude bomb was tied to the waist of the man and exploded when he entered the chamber and was about to take a seat.

The six -- four lawyers and two clients -- present in the chamber were injured in the blast, he said. The police captain said the condition of the advocate, one of the injured, is serious and has been rushed to Patna Medical College and Hospital for further treatment.

The security of the court premises has been beefed up in view of the blast, the SP said, adding the investigation is on.

District Magistrate Safina A N visited the sadar hospital where the injured were admitted and instructed the authorities to provide prompt treatment to those injured in the blast.