A Gulf country has denied landing rights to Pakistan International Airlines for the first time, causing a lot of embarrassment to the ailing state-run carrier. The Dubai Civil Aviation Authority refused to give landing rights to PIA for operating flights to Dubai from Sialkot International Airport, without mentioning any specific reason for the move.PIA had planned to start direct flights between Sialkot and Dubai from November 30 and had applied for landing rights a month earlier in line with the agreement between the Governments of Pakistan and the United Arab Emirates.