The Champions League quarter-finals will go ahead as scheduled amid an alleged terror threat, UEFA says.
A media outlet linked to the so-called Islamic State (IS) allegedly issued a threat concerning all four of this week's ties.
Two English clubs, Arsenal and Manchester City, are playing tonight in the Champions League quarter-finals.
The Gunners will host the first leg of their last-eight tie at the Emirates Stadium against German giants Bayern Munich.
While Manchester City are in action away to Real Madrid where local reports said the roof was going to be closed for the game.
Tomorrow, there are two further games, one in Paris, between PSG and Barcelona, and a second game in Madrid, between Atletico Madrid and Borussia Dortmund.
For the clash in the French capital, the country's Interior Minister Gerald Darmanin said that security had been "considerably reinforced".
'Alleged terrorist threats'
In a statement UEFA, Europe's club football governing body, said: "UEFA is aware of alleged terrorist threats made towards this week's UEFA Champions League matches and is closely liaising with the authorities at the respective venues.
"All matches are planned to go ahead as scheduled with appropriate security arrangements in place."
Mr Darmanin said that security will be "considerably reinforced" in Paris after a "threat" by the IS group.
"We have seen, among others, a communication from the Islamic State which is particularly aimed at stadiums", Mr Darmanin added.
Meanwhile a Spanish government minister said they had taken all necessary precautions to avoid any terror attacks.
Over the two Madrid games, there will be over 2,000 agents from the National Police and Civil Guard taking part in a surveillance operation of the city, along with municipal police, Spanish media reports.
