Investigators who attempted to arrest South Korean president Yoon Suk-yeol at his home on Friday were reportedly involved in a stand-off with the military.

Officials entered Mr Yoon’s official residence as part of an investigation into his botched attempt to impose martial law which last month triggered a constitutional crisis.

Corruption Investigation Office staff, including senior prosecutor Lee Dae-hwan, were let through heavy security barricades to enter the residence to attempt to execute their warrant to detain Mr Yoon, 

But they were “blocked by a military unit inside” after entering, the Yonhap news agency reported.

It had been unclear whether the Presidential Security Service, which still protects Mr Yoon as the country’s sitting head of state, would comply with investigators’ warrants.

Members of his security team have previously blocked attempted police raids of the presidential residence, but it was not immediately clear which unit had blocked investigators on Friday.