SEOUL • Three Indonesian migrants who were illegally residing in South Korea have been deported on suspicion of supporting an international terrorist group affiliated with Al-Qaeda, South Korea's spy agency has said.

The government deported a 32-year-old Indonesian man from South Korea on Dec 1 and two others on Nov 24 for violating the Immigration Control Act, the National Intelligence Service said on Tuesday. Their identities were withheld.

The 32-year-old Indonesian, suspected of having supported the Al Nusra Front, had written on Facebook that he would join a plot to conduct terror attacks. The Al Nusra Front is an Al-Qaeda offshoot behind murders and decapitations in Syria.

He also allegedly raised funds through a bank account to financially support the terrorists, and an extremist flag was found at his residence in North Gyeongsang province, the spy agency said.

The two others, who were deported last month, are friends of another 32-year-old Indonesian currently being detained and questioned by the police over his link to the Al Nusra Front, according to the spy agency.

Last month, the agency announced it had arrested the Indonesian in South Chungcheong province on charges of violating the immigration law and forging documents.

The man had entered South Korea on a fake passport in 2007.

The man was found to have posted a video clip of himself waving the terrorist group's flag atop a mountain and a photo wearing a cap with the group's logo on social media in April. He also wrote that he would join the Syrian war.

THE KOREA HERALD/ASIA NEWS NETWORK