Tensions ran high near the residence of impeached South Korean President Yoon Suk Yeol Thursday, as rival protesters clashed and hundreds of supporters formed a blockade to prevent his imminent arrest.

The impeached president faces an attempt by authorities to arrest him over his short-lived Dec. 3 martial law.

South Korea's impeached president, facing an unprecedented arrest on insurrection charges linked to his declaration of martial law, has sent a letter rallying supporters. Police meanwhile stood guard outside his home.