sentences:  A planned weekend meeting in Lancaster, California, expected to draw 800 Mongols and their families, was blocked after city officials shut down and fenced off the hotel they had booked for the event, which coincided with the "Celebrate Downtown Lancaster" festival.The mayor had previously threatened to shut down the hotel over unpaid taxes if the agreement to host the Mongols was not canceled.An attorney for the Mongols said he planned to sue the city and the mayor, potentially for civil rights violations, after previously threatening to sue the hotel for breach of contract should they comply with the mayor's demands.