The News of the World says it has suspended one of its staff following "a serious allegation" of wrongdoing, BBC News reports.
A spokesman for the newspaper said the individual had been suspended from active duties just before Christmas.
He said the allegation was the subject of legal action as well as an internal investigation and, if proven, "appropriate action" would be taken.
"The News of the World has a zero tolerance approach to any wrong-doing," the spokesman added, BBC News says.
MediaGuardian has named the NoW employee as Ian Edmondson, the title's assistant editor (news), and says the allegations involve phone-hacking.