Reuters quoted protest leaders in Sri Lanka that the demonstrators will continue to occupy the President's Palace and the Prime Minister's Residence until they resign.
This coincides with a number of ministers in the Sri Lankan government announcing their resignations in light of the continuing sit-in of the protesters.
According to an unnamed government official, at least 4 ministers have submitted their resignations, while several other ministers are expected to follow suit.
And Minal Fernandez, Al-Jazeera correspondent in Colombo, said - during an interview that took place earlier - that there are vigorous negotiations to form a government of national unity.
Parliament Speaker Mahinda Yapa Abiwardena announced that Sri Lankan President Gotabaya Rajapaksa, the hero of the quarter-century civil war against the Tamil rebels, intends to resign on Wednesday.
He added - in a video statement - that the president took the decision to step down on July 13 to ensure a peaceful handover of power, calling on citizens to respect the law and maintain peace.
Prime Minister Ranil Wickremesinghe's office said he, too, had agreed to step down.
cautious calm
On Sunday, the streets of Colombo witnessed a cautious calm, the day after the president and the prime minister agreed to resign, after thousands of protesters stormed the presidential palace and the prime minister's house and set it on fire amid anger over the collapse of the country's economy.
Medical sources said that yesterday's protests resulted in the injury of more than 100 people, including 11 journalists.
A live broadcast on Facebook from inside the presidential palace yesterday, Saturday, showed hundreds of protesters, some with flags around their bodies, crowding the palace rooms and corridors and chanting slogans against Rajapaksa.
Videos showed some protesters swimming in the swimming pool inside the palace, others sitting on mattresses and sofas, and some seen emptying a chest of drawers;
In clips spread widely across social networking sites.
Local news channels also broadcast pictures of a huge fire and smoke rising from the prime minister's house in a wealthy suburb of Colombo, after it was stormed and set on fire.
On the other hand, the International Monetary Fund, which is in talks with the Sri Lankan government on a possible $3 billion rescue plan, said it hoped a solution to the current situation would be found that would allow the resumption of dialogue on an IMF-supported program.
US Secretary of State Anthony Blinken also said that his country is closely monitoring developments in Sri Lanka, and that the people there are demanding transparency and a better future.
Blinken condemned the violence against the demonstrators, calling for a comprehensive investigation and the prosecution of those responsible for the violent incidents that took place during the demonstrations.
American condemnation
Earlier, a spokesman for the US State Department said that the ministry is closely following these developments and condemns any violence against peaceful protesters and journalists.
"We urge this government or any constitutionally elected new government to work quickly to identify and implement solutions that will achieve long-term economic stability, and address the Sri Lankan people's resentment of deteriorating economic conditions, including shortages of energy, food and fuel," he added.
It is noteworthy that Sri Lanka has been witnessing massive demonstrations for some time, demanding the resignation of the country's President Gotabaya Rajapaksa and Prime Minister Ranil Vikremesinghe, in the context of large demonstrations against the poor living due to the economic crisis.
And Wickremesinghe had previously announced last June, the complete collapse of his country's economy and its inability to even pay the dues for oil imports.
Sri Lanka has been suffering for several months, severe shortages of food, fuel and medicine, the worst economic crisis since the country's independence in 1948, after the Corona pandemic led to a significant decrease in tourism revenues and remittances from expatriates.