SEOUL (AFP) — South Korean investigators abandoned their attempt to arrest impeached President Yoon Suk Yeol at his residence on Friday over a failed martial law bid, citing safety concerns after a standoff with his security team.

Yoon, who has already been suspended from duty by lawmakers, would become the first sitting president in South Korean history to be arrested if the warrant is carried out.

The president, who issued a bungled declaration on 3 December that shook the vibrant East Asian democracy and briefly lurched it back to the dark days of military rule, faces imprisonment or, at worst, the death penalty.

“Regarding the execution of the arrest warrant today, it was determined that the execution was effectively impossible due to the ongoing standoff,” the Corruption Investigation Office (CIO), probing Yoon over his martial law decree, said in a statement.

“Concern for the safety of personnel on-site led to the decision to halt” the arrest attempt, the statement said of the confrontation with Yoon’s presidential security service and its military unit.

Around 20 investigators and 80 police officers were heavily outnumbered by around 200 soldiers and security personnel linking arms to block their way after entering the presidential compound, a CIO official told a briefing.

“I understand there were minor and major physical altercations,” said the official, who spoke on condition of anonymity, adding that buses and cars were also parked to block their way.

Negotiations between the two sides ultimately faltered and the investigators decided to leave for their team’s safety, although another execution of the warrant could take place after a review, the official said.

The deadline for the warrant is Monday, leaving it in limbo with just a few days remaining and Yoon defiant, vowing this week to “fight” authorities trying to question him.

Yoon’s security service — which still protects him as the country’s sitting head of state — has previously blocked attempted police raids of the presidential office.

The president himself has ignored three rounds of summons from investigators, prompting them to seek the warrant.

Yoon’s legal team — who raced to the residence and whom Agence France-Presse saw were allowed inside — said police had no right to execute the warrant at a “first-class military secret protection facility.”