SEOUL — Seoul Western District Court on Tuesday night reissued a warrant to detain impeached President Yoon Suk Yeol.

The Corruption Investigation Office chief, Oh Dong-woon, said during a parliament hearing that they would “thoroughly prepare for the execution of arrest, as if it was the last chance.”

The effort to detain Yoon came after a South Korean court issued an arrest and search warrant on Dec. 31 over his short-lived imposition of martial law, ABC News confirmed. Yoon has been suspended from his position since Dec. 14.

Yoon’s attorney told reporters Wednesday that he is still at his residence and is greatly disappointed to hear rumors saying he had fled. Opposition lawmakers had spread those rumors, the attorney said.

To prepare for another arrest attempt, the President’s Secret Service heightened surveillance near the Presidential residence, adding more chains to the barbed wire fence and blocking vehicles.

Yoon’s lawyer said he still strongly believes that the CIO’s execution of the arrest warrant is illegitimate, as the CIO lacks the authority to investigate insurrection. He also pointed out that the Seoul Western District Court, which reissued the arrest warrant, has no jurisdiction. Nevertheless, he told reporters, the impeached president would stand trial if he were to be indicted.

Thousands had gathering on Sunday, a day before another arrest warrant for Yoon expired, near impeached the presidential residence

Protesters from both sides — one calling the warrant invalid or illegal and the other shouting for arrest — have occupied the wide four-lane road in a normally quiet neighborhood, blocking all traffic, in freezing temperatures and snow.

Yoon declared martial law in a televised speech on Dec. 3. The president said the measure was necessary due to the actions of the country’s liberal opposition, the Democratic Party, which he accused of controlling parliament, sympathizing with North Korea and paralyzing the government.

Animosity has been sky-high between the two sides, after over 100 investigators from the CIO anti-corruption agency and the police retreated from the residence after a tense standoff with the presidential security service.

Yoon’s die-hard supporters have been camping on the street vowing to protect him from “pro-North Korean forces about to steal away the presidency.” Anti-Yoon protesters who are backing of the opposition party claim that Yoon must be jailed for insurrection.

ABC News’ Joohee Cho and Morgan Winsor contributed to this report.