Triggering a virtual rebellion against Andhra Pradesh chief minister N Kiran Kumar Reddy, state health minister D L Ravindra Reddy Thursday sent his resignation to Congress president Sonia Gandhi "taking moral responsibility" for the party's poor show in the by-elections.

Reddy, who had been at loggerheads with the chief minister for sometime now, faxed his resignation letter to Gandhi after the party's rout in the by-elections to seven assembly constituencies and suggested that the entire cabinet, including Kiran, quit to give a "free hand" to the Congress president for "cleansing" the government and the party in the state.

Raising his voice against the chief minister, his deputy Damodar Rajanarasimha Rao suggested that Kiran better "step aside" if he could not set things in order.

"The by-election results are a serious warning to the Congress and the government," Damodar observed today.

Former minister P Shanker Rao also demanded that the cabinet own responsibility for the bypoll debacle and quit at once.

Other senior leaders of the party, including some former ministers and leaders of Telangana, too started seeking the sack of the chief minister, holding him squarely responsible for the drubbing in the by-elections.

The deputy chief minister held an informal meeting with ministers and legislators belonging to scheduled castes in the assembly today wherein the by-poll results were discussed.

Sources said the deputy chief minister was trying to shore up support to fellow SC legislators in his support to challenge the chief minister.

For the record, Damodar said the SC ministers and legislators would meet formally on Monday to discuss the implementation of the Scheduled Castes Sub-Plan and other issues related to the community.