Ranchi, July 25 - Former human resources minister of Jharkhand and independent legislator Bandu Tirkey has been booked under the Arms Act after officials found an unlicensed revolver and 13 live cartridges at his house here, police said Saturday.

Officials of the vigilance department had raided the houses of former chief minister and Lok Sabha MP Madhu Koda and three ex-ministers, including Tirkey, in connection with a graft case.

During the search, the revolver and live cartridges were found Tirkey's house in Banhaura village on the outskirts of Ranchi, the police claimed.

A First Information Report (FIR) was lodged against Tirkey late Friday at Sukhdeonagar police station of Ranchi. The FIR has been lodged under the Arms Act. He could be arrested, a police officer said.

Tirkey has demanded a probe into the finding of the arms in his house.

'I do not know from where arms came to my house. When I enjoy official security then why I will keep unauthorised arms,' Tirkey told reporters.