Neither TV broadcasts nor journalists on site have noted any incidents in the stands during the return match of the 16th final on February 19.
In its statement, the European Football Association (Uefa) only writes that supporters of the home team have breached paragraph 14 of the association's disciplinary rules, which deals with "racism, other discriminatory behavior and propaganda", reports the news agency AFP.
In addition to a fine of over 330,000 kronor (30,000 euro), the club can be punished with "at least" 500 fewer seats at the home stadium, which has a capacity of 78,297 spectators, in the event of future similar infringements.
Real Madrid won the match 3–1 and advanced to the quarterfinals with a total score of 6–3.