New Delhi, Aug 3 - Former home minister Buta Singh Monday accused the Central Bureau of Investigation (CBI) of executing a 'political conspiracy' against him by 'framing' his son Sarabjot alias Sweety Singh, who was arrested for allegedly accepting a a bribe of Rs.1 crore.

'It is a political conspiracy against me and the CBI is responsible for masterminding it. CBI is not playing the role of an investigating agency. I and my son are being victimised,' Buta Singh told reporters here.

Buta Singh, who is now chairman of the National Commission for Scheduled Castes / Scheduled Tribes (SC/ST), refused to identify the person or political party behind the whole episode.

'I won't share it with the media and will disclose when the right time comes,' he said.

Sweety Singh was arrested Friday on charges of accepting a Rs.1 crore bribe -- the first instalment of the Rs.