China has released a Korean-American missionary arrested last year over a nonprofit school he ran near the border with North Korea, his lawyer said, resolving a case that sparked outcries from international Christian groups.

A crackdown has forced hundreds of Christian missionaries out of China, most by having their visas refused, sources said last year.

Supporters of Korean-American missionary Peter Hahn had said authorities targeted him because of his Christian faith and because of the small vocational school he ran.