Pop singer Richard Marx uses rope to restrain unruly flight passenger

American singer Richard Marx has said he had to restrain a fellow passenger on a Korean Air flight, after the man allegedly attacked others onboard, BBC reported

The incident happened as Marx and his wife, Daisy Fuentes, were travelling from Hanoi to Seoul on Tuesday.

The man was arrested upon landing and South Korean police said he was drunk, reported Yonhap news agency.

Marx called the incident "chaotic and dangerous" and alleged the crew were "completely ill trained".

Korean Air confirmed an unruly passenger was subdued and that he had been turned over to police, but did not respond to Marx's specific allegations about their crew.

Marx, known for 1980s hit Right Here Waiting, and Fuentes, a former MTV VJ, shared pictures of the incident on their social media accounts.

Fuentes said on Instagram that the man was sitting in the next row from them when he "got crazy and started attacking the flight attendants and passengers", including "pushing the female staff and pulling them by the hair".

She said the staff appeared ill-prepared, and subduing him took four hours.

"They never fully got control of him. They didn't know how to use the taser and they didn't know how to secure the rope around him (he got loose from their rope restraints three times)," she said.