The fighting in the chamber came a day after it passed a no-confidence vote against Rajapaksa's government. When Parliament re-convened, Speaker Karu Jayasuriya said the country had no government and there was no prime minister — either Rajapaksa or his rival whose ousting in late October by the president started the crisis.
Rajapaksa disagreed, saying "a vote should have been taken. Such important motions should not be passed by a voice vote." He added that Jayasuriya has no power to remove or appoint the prime minister and Cabinet members.
He accused the speaker of being partial and representing the position of his party, the United National Party, which is led by ousted Prime Minister Ranil Wickremesinghe.
Rajapaksa also called for fresh elections, suggesting that it was the best way to resolve the crisis.
Clashes erupted after the opposition asked for a vote on Rajapaksa's statement, with lawmakers supporting him gathering in the middle of the house while some ran toward the speaker shouting slogans condemning his behavior.
More than three dozen lawmakers fought and some who fell on the floor were kicked by rivals. Some of the lawmakers supporting Rajapaksa threw water bottles, books and trash cans at the speaker. Lawmakers opposed to Rajapaksa surrounded Jayasuriya to protect him. The ensuing commotion went on for about half an hour before Jayasuriya adjourned the house.
Sri Lanka has been in a crisis since Oct. 26, when President Maithripala Sirisena suddenly fired Wickremesinghe and replaced him with Rajapaksa. The former president is considered a hero by some of the ethnic Sinhalese majority for ending a long civil war by crushing Tamil Tiger rebels. However, his time in power was marred by allegations of wartime atrocities, corruption and nepotism.
Sirisena had also suspended Parliament, apparently to allow Rajapaksa time to gather support among lawmakers. But Wickremesinghe insisted his firing was unconstitutional. He refused to vacate his official residence and demanded that Parliament be summoned to prove he still has support.
On Tuesday, the Supreme Court suspended Sirisena's order to dissolve Parliament and hold new elections until next month.
Wickremesinghe said on Wednesday that the no-confidence vote proves that Rajapaksa's administration does not enjoy the support of Parliament and is illegal.
Tensions had been building between Sirisena and Wickremesinghe for some time, as the president did not approve of economic reforms introduced by the prime minister. Sirisena has also accused Wickremesinghe and another Cabinet member of plotting to assassinate him, a charge Wickremesinghe has repeatedly denied.