France, April 9 -- French police chiefs on Tuesday revealed they plan to step up security in Paris ahead of the Champions League clash between Paris Saint-Germain and Barcelona on Wednesday night.

The first leg of the quarter-final football match is expected to attract nearly 50,000 people to the Parc des Princes on the western fringes of Paris.

Thousands more will be following the tie in cafes and bars in and around the capital.

"The prefect of police prefect has considerably strengthened security resources," said French Interior Minister Gerald Darmanin during a visit to River Police officers on Tuesday.

"There has been a clear threat publicly mentioned by the Islamic State," Darmanin added.

Last month the group claimed responsibil...