ISLAMABAD: Security was tightened around a five-star hotel on Saturday after the Balochistan Liberation Army (BLA) threatened to attack it in retaliation to the ongoing "military operation" in Balochistan. Police sources said an unidentified person called the Marriott Hotel management, threatening that the BLA would attack the hotel. The hotel management informed the police of the threat. SHO Secretariat police confirmed that the hotel security had been beefed up.