An unidentified man has assaulted the Radio Free Europe-Radio Liberty bureau chief in the Armenian capital Yerevan, in what appears to be a politically motivated attack.

The broadcaster, in a statement, says Hrach Melkumian suffered bruises and broken teeth in Tuesday's incident. It says the attacker cursed the radio and denounced its programs.

RFE/RL President Jeffrey Gedmin called the incident "a targeted attack on our people and our programs."  He called for an immediate investigation into what he said was the first physical attack on the organization's Armenian service.

Radio Free Europe-Radio Liberty is funded by the U.S. government.  It broadcasts five hours of programming a day to Armenia via satellite and FM radio.