UEFA said that security will be tightened around Wednesday's Champions League quarter-final games following a bomb attack on the Borussia Dortmund team bus.

The European governing body said that with police, security services and clubs it "is reviewing the security arrangements for tonight's matches and security procedures will be enhanced accordingly wherever needed".

Dortmund are to play their re-arranged home game against Monaco while Bayern Munich host Real Madrid and Atletico Madrid are home to Leicester City on Wednesday. Security has already been visibly ramped up around the Bayern-Real game in Munich.

"While there has been no specific intelligence regarding any threat to tonight's matches we would like to assure teams, officials and supporters that UEFA always insists upon the highest standards of safety and security arrangements for competition matches," added a UEFA statement.