The American University in Cairo announced Sunday that it is suspending operations -- including classes -- because protesting students have for the last week been closing the gates to the campus. Closing the gates creates a safety hazard, the statement said, because emergency vehicles would be unable to enter. "The obstruction of access and the prevention of other students from receiving the education to which they are entitled will not be tolerated. The administration will be taking disciplinary action against those students who obstructed access and behaved in ways inconsistent with university policy," said the statement. The students are angry over tuition increases. University officials said that they have been negotiating with the students, but that some of the protest demands (such as rescinding this year's tuition increase) are not possible.