I am struggling to find any concrete news from Luxor, but this firsthand account from BBC News suggests that there are rioters even in tourist areas:
Prof Steve Flint, from Liverpool, writes: "Tear gas blew into the Luxor Sheraton last night and big protests in town. Luxor airport in comms meltdown this morning with domestic flights cancelled and delayed, yet coach loads of tourists kept arriving. I managed to get out on a direct flight to Doha on Qatar Airways and am in Doha now, flying to Manchester later tonight. Central Luxor was very tense this morning, with trucks of riot police across town at 08.00. If things escalate it will be difficult to get all the tourists out quickly."