New Delhi/Mumbai, Aug 1 - Former union home minister Buta Singh will be questioned, Central Bureau of Investigation (CBI) sources said, after reportedly seizing Saturday three unlicensed pistols from the Delhi house of his son Sarabjot Singh who has been arrested on corruption charges.

A case under the Arms Act was registered against Sarabjot alias Sweety Singh at the Nizamuddin police station in south Delhi.

Sweety Singh was arrested Friday and remanded to police custody by a Mumbai court till Aug 5 after he was caught allegedly taking a bribe of Rs.10 million from Nashik-based contractor Ramraj Patil to facilitate the withdrawal of a case against Patil for not paying his Dalit workers.

'Following Sweety Singh's interrogation, CBI team reached his house in south Delhi today (Saturday) morning and conducted searches. Three unlicensed pistols and 38 cartridges were recovered,' said a senior CBI official requesting anonymity.

A CBI official in Mumbai earlier said that Buta Singh, now chairman of the National Commission for Scheduled Castes/Scheduled Tribes, would also be questioned in connection with the corruption charges against his son.

'We shall question Buta Singh and all other people whose names figure in the complaint,' the official said on condition of anonymity. Sarabjot Singh has reportedly said that his father was aware of his bribe taking.

The official declined to specify when or where Buta Singh will be questioned.