SEOUL: South Korean authorities banned more top officials from leaving the country on Tuesday, in the wake of President Yoon Suk Yeol`s bungle d attempt to impose martial law.

A day af ter Yoon himself was hit with a travel ban, his party was meanwhile forging a `resignation roadmap` that reportedly could see him step down in February or March before fresh elections, while the opposition plans to organise an impeachment vote every Saturday.

Yoon suspended civilian rule a week ago and sent special forces and helicopters to parliament, before lawmakers forced him to rescind the decree in a country assumed to bea stable democracy.

Investigators are probing the president and a cabal of allies many from the same school for alleged insurrection over the sequence of extraordinary events.

On Tuesday Cho Ji-ho, commissioner general of the Korean National Police Agency, and two other top police officials became the latest to be barred from foreign travel, police said.

Already under a travel ban are the former defence and interior ministers and martial law commander General Park An-su, who along with other top brass was grilled by lawmakers on Tuesday.-AFP