South Korean President Yoon Suk-yeol has been banned from leaving the country over a failed attempt at imposing martial law, amid growing calls for him to step down and a deepening leadership crisis.

Oh Dong-woon, the head of the Corruption Investigation Office for High-ranking Officials, said on Monday he ordered a ban on foreign travel for Yoon when asked at a parliament hearing what actions have been taken against the embattled president. Yoon’s People Power Party PPP staged a walkout of the chamber before a vote to impeach the president on Saturday, prompting accusations of being “accomplices to insurrection” after the motion failed.

On Sunday, PPP leader Han Dong-hoon said Yoon would be excluded from foreign and other state affairs, and Prime Minister Han Duck-soo would manage government affairs until Yoon eventually stepped aside. Al Jazeera’s Eunice Kim, reporting from Seoul, said the “big question” was how long the governing party would be able to maintain the scheme, which has caused uncertainty over who is in charge South Korea’s opposition accused the governing party on Monday of staging a “second coup” by clinging to power and refusing to impeach Yoon. Claiming that the president can remain in office but has delegated his powers to the prime minister and the PPP leader – who is not an elected official – is “a blatant constitutional violation with no legal basis”, Democratic Party floor leader Park Chan-dae said.

Yoon has refused calls, including some from within his own party, to resign, and his future looked more uncertain on Thursday when a team at the National Police Agency launched an investigation into the president for alleged treason. While a sitting South Korean president has immunity from prosecution while in office, that does not extend to allegations of rebellion or treason. The president gave the military sweeping emergency powers on December 3 to root out what he called “anti-state forces” and obstructionist political opponents. He rescinded the order six hours later, after parliament defied military and police cordons to vote unanimously against the decree.  (Al Jazeera)