Tears, dismayed cries and shocked faces: that was the reaction among the supporters of South Korea’s suspended president Yoon Suk Yeol outside his home on hearing that he had been arrested.

It was a moment that had been in the making for weeks – ever since the last attempt to arrest Yoon on 3 January had failed after a dramatic standoff.

Yet, when the news of his arrest on came on Wednesday morning, it only seemed to create more uncertainty – and highlight the divide in a country that has already been deeply polarised by Yoon’s short-lived martial law order and impeachment by parliament.

“This country is in crisis,” said one pro-Yoon woman, tears streaming down her face. “I’ve been praying since last night for a stable and peaceful South Korea.”

It’s what both sides say they want but they cannot agree on how to get there.

For the past month, a defiant 64-year-old Yoon was holed up inside his presidential compound in central Seoul, as his supporters and detractors rallied outside. They had turned Yongsan in central Seoul into an epicentre of protest, with tensions often running high.

Hundreds of them had camped out overnight on Tuesday, as the arrest appeared imminent, in temperatures that plummeted to -8C. The only thing they shared was the food trucks keeping them warm with steaming drinks and instant noodles.

Yoon’s supporters jostled with the police officers – numbering 3,000 – who assembled to take him into custody. “Don’t call us stupid far-rights,” one protester shouted, reflecting the frustration in the Yoon camp.

A starkly different scene unfolded on the other side of the street. Opponents of Yoon, who had long called for his arrest, celebrated with chants and cheers.

Their jubilation only made the pro-Yoon camp angrier, with some yelling: “Don’t taunt us – this is not funny.”

The gulf is not restricted to this corner of Yongsan. It has loomed over the whole country for more than a month.

Yoon’s shock announcement of martial law on 3 December almost instantly divided public opinion into two camps.

While some believed his claims the country was under threat, a larger group viewed the move as an opportunistic abuse of power. This sentiment was reflected even within Yoon’s own party, as several of its lawmakers voted to impeach him.

The growing opposition to Yoon’s actions has cast a pall over the nation.

The year-end season in South Korea is usually vibrant. But this year has been noticeably different. The political turmoil – along with the devastating Jeju Air crash on 29 December – has created a subdued and sombre atmosphere.

Yoon himself had largely avoided the public since he was impeached by parliament in mid-December.

He never stepped out of his residence to meet his supporters. On New Year’s Day, he sent them a note, saying he was “closely watching [them] via a YouTube livestream”. He skipped the first hearing of his impeachment trial on 14 January, delaying the proceedings.

Before that he had refused to comply with multiple summonses as part of the criminal investigation on insurrection charges, which led to the arrest warrant.