All four Telangana Rashtra Samiti MPs, including its leader K Chandrasekhar Rao, on Monday resigned from the Lok Sabha protesting the delay in creation of a separate Telengana state.

The TRS members, Rao, Vinod Kumar, Ravindra Naik and T Madhusudan Reddy, submitted their resignations to Lok Sabha Speaker Somnath Chatterjee as the House assembled in the morning.

Raising slogans of 'Jai Telengana', the TRS members walked out of the House.

The move is being seen as TRS' attempt to put pressure on the United Progressive Alliance government on the demand for a Telengana state.

Leader of the Opposition L K Advani noted that it was the first occasion when members have given their resignation in the House itself.

"In many, many years, it is the first occasion in the House that members have submitted their resignation in the House itself. The issue of Telengana deserves a full-fledged discussion," Advani said and added that the President's Address to Parliament did not make any mention of the issue.

The development also saw members of the treasury and opposition trading charges.

All 16 MLAs and three MLCs belonging to the party will resign from the Andhra Pradesh Assembly on Tuesday.

Announcing the decision to resign from Lok Sabha on Sunday, Rao had accused the Congress, with which it had contested the previous Assembly elections, of betraying it after coming to power on the issue of a separate Telengana state.

"We are fighting for a just cause. The people of Telangana will never forgive those who oppose the formation of separate state," he had said, adding, "We will succeed in our demand. No body can stop us".