Cyprus police are investigating how an officer mistakenly telephoned a Serbian who was suspected of being the ringleader in a mafia-linked assassination plot.

Police spokesman Andreas Angelides said Monday the officer intended to call his counterpart at Interpol's office in Serbia in March this year, but erroneously called the suspect instead. An investigation found it was a genuine mistake and not corruption-related.

The second probe will determine if the officer will face any disciplinary measures.

Cyprus police say the error happened after they were informed by Belgrade about a planned assassination attempt.

Critics claim the gaffe warned the plot ringleaders, who postponed the assassination to June, when a 51-year-old Cypriot businessman was killed in the resort of Ayia Napa. No one has been convicted of the killing yet.