European football's governing body did not specify in its statement what incidents were being investigated during the Euro 2020 match in Munich, which finished with the Germans qualifying for the last 16 and Hungary going out of the competition.
Vowing defiance, Munich was planning to put up rainbow-coloured flags at its town hall and illuminate a huge wind turbine close to the stadium, as well as the city's 291-metre (955-foot) Olympic Tower.
The mayor of Munich, Dieter Reiter, had wanted the stadium in rainbow colours for the crucial Group F match to "send a visible sign of solidarity" with Hungary's LGBT community.
From schedule to capacity, all you need to know about the 11 host stadiums for Euro 2020
Bavaria governor Markus Söder said spectators would need masks, that there may be a need for coronavirus testing, and that the stadium would be organised to prevent crowds from forming when fans are entering and leaving.
Alaba has been hugely successful at Bayern, where he spent 13 years, having won two Champions League trophies and 10 league titles among other silverware.
Flick is the red-hot favourite to replace Loew, having asked to be released from his Bayern contract.
Flick is expected to sign for three years, according to the Abendzeitung, a Munich newspaper, allowing him to lead the national team at the 2022 World Cup in Qatar and Euro 2024, which is scheduled to take place in Germany.
German Cup: Borussia Dortmund rout Holstein Kiel sans Erling Haaland to book finale against RB Leipzig
Haaland, suffering from a thigh injury, watched from the stands at Signal Iduna Park as Giovanni Reyna started the rout with the first two goals to help put Dortmund in the final
Mbappe has shaken off a minor thigh injury and is fit for the clash between two of the most potent attacking sides in Europe, both chasing a maiden Champions League trophy.
Julian Nagelsmann's Leipzig trimmed Bayern's lead at the top to seven points with three games left. The Bundesliga takes a break next weekend forcing Bayern to wait for another chance to clinch the title.
European Super League: German football federation calls for 12 founding clubs of breakaway league to be barred
"The clubs and their junior teams should be excluded from all competitions, until they have a second thought for their many supporters who made them into the giants of world football, and not just think of their wallets," DFB president Fritz Keller said.
Hansi Flick, who has led Bayern to six trophies over the last 12 months, made the shock revelation on Saturday after the club's 3-2 win over Wolfsburg put them seven points clear at the top of the Bundesliga.
Flick, who has a contract with the club to 2023, said he told the team he had informed the club of his wish to leave.
Champions League: Hansi Flick mulls future after Bayern Munich ouster amidst Germany coaching speculation
Flick led Bayern to a Champions League, Bundesliga and German Cup treble after taking over from Niko Kovac in November 2019
Lewandowski, voted FIFA's best male player of 2020, injured ligaments in his right knee a fortnight ago while on international duty with Poland.
Serge Gnabry "has tested positive for the coronavirus. The FC Bayern forward is okay and isolating at home," Bayern said ahead of the quarter-final, first leg tie against PSG.
Seth Rogen, who last starred in HBO's An American Pickle, will essay the role of Steven Spielberg’s "favourite uncle" in the movie.
Bundesliga: Bayern Munich star Thomas Mueller moved to cellar of his house while suffering with COVID-19
Mueller said he felt ill after testing positive for the coronavirus in Qatar before the Club World Cup final on 11 February
Pavard could be an option for Saturday's Bundesliga match at home to Borussia Dortmund with Bayern two points clear at the top of the Bundesliga table.