Parents with children at international schools have attacked their recruitment methods after an American teacher at Shanghai French School was arrested on suspicion of molesting six students.

Police have identified the suspect, who was arrested on Thursday, only by his surname, McMahon.

Ye Qin, whose 8-year-old daughter goes to an international school in Shanghai, said, "Many international schools recruit teachers themselves and don't check if they are suitable for the profession or have criminal records or tendencies." Other parents echoed her views.