(Updates with no bomb found) SARAJEVO, Dec 22 (Reuters) - Bosnia's state television received a bomb threat at its headquarters in the capital Sarajevo on Monday, but police searching the building found no explosives, a police spokesman said. "A bomb squad thoroughly searched the Public Broadcast Service building following the threat, which was made by telephone, but no explosives were found," Sarajevo police spokesman Dragan Miokovic told Reuters. (Reporting by Maja Zuvela)