While the government’s Smartraveller website still accords South Korea the lowest warning level of “exercise normal safety precautions”, it offers advice to Australians travelling to or in the country.

“The situation in South Korea is evolving due to developments in domestic politics,” the wesbite read.

“Avoid protests and demonstrations. Sites like Gwanghwamun Square and Yeouido in Seoul may have larger crowds and more protest activity than usual.

“Transport and other essential services may be disrupted. Monitor the media for updates and follow the advice of local authorities.”

It advised that the Australian embassy was open but was not offering in-person services.

Protesters clashed with troops overnight after South Korea President Yoon Suk Yeol declared the country under martial law in response to political opponents he accused of sympathising with North Korea and sabotaging the governing process.

The country’s parliament, including the leader of Yoon’s own party, rejected the declaration and voted against its implementation.

Yoon acknowledged the opposition and convened his cabinet to lift martial law early this morning, after about six hours.

The country’s military had approached the parliament building during the night but were observed leaving later.