Sri Lanka’s president has dissolved Parliament and called for elections on January 5 in a bid to stave off a deepening political crisis over his dismissal of the prime minister that opponents say is unconstitutional.

An official notification signed by President Maithripala Sirisena announced the dissolution of Parliament effective from midnight on Friday.

It said the names of candidates will be called before November 26 and the new Parliament is to convene on January 17.

Sri Lanka has been in a crisis since October 26, when Mr Sirisena fired his prime minister, Ranil Wickremesinghe, and replaced him with former strongman Mahinda Rajapaksa.

Sri Lanka Politics
Sri Lankan president Maithripala Sirisena, right, and his newly appointed prime minister Mahinda Rajapaksa (Eranga Jayawardena/AP)

Both say they command a majority in Parliament and had been expected to face the 225-member house on Wednesday after it was suspended for about 19 days.

Foreign Minister Sarath Amunugama told reporters that the reason for the president to dissolve Parliament was the need to go to the people to find a resolution to the crisis.

“On the 14th there was to be a lot of commotion and unparliamentary activities sponsored by the speaker,” Mr Amunugama said.

“The speaker was not planning to act according to the constitution and standing orders of Parliament.”

Mr Sirisena’s supporters had been irked by Speaker Karu Jayasuriya’s announcement that he was going to call for a vote for either party to prove their support.

“The dissolution clearly indicates that Mr Sirisena has grossly misjudged and miscalculated the support that he might or could secure to demonstrate support in the Parliament,” said Bharath Gopalaswamy, director at US-based analyst group Atlantic Council’s South Asia Centre.

“At the end of the day, he is a victim of his own homegrown crisis.”

Mr Wickremesinghe has insisted his firing is unconstitutional. He has refused to vacate his official residence and demanded that Parliament be summoned immediately to prove he had support among its members.

Tensions had been building between Mr Sirisena and Mr Wickremesinghe for some time, as the president did not approve of economic reforms introduced by the prime minister.

Mr Sirisena has also accused Mr Wickremesinghe and another Cabinet member of plotting to assassinate him, a charge Mr Wickremesinghe repeatedly denied.

Mr Sirisena was critical of investigations into military personnel accused of human rights violations during Sri Lanka’s long civil war against a Tamil separatist group, which ended in 2009.

Mr Rajapaksa, who ruled as president from 2005 to 2015, is credited as a hero by the ethnic Sinhalese majority for winning the conflict.

But he lost a re-election bid in 2015 amid accusations of nepotism, corruption and wartime atrocities.

Mr Wickremesinghe’s camp is likely to contest Mr Sirisena’s move because of constitutional provisions stating a Parliament cannot be dissolved until four-and-a-half years after its election.

The current Parliament was elected in August 2015.