Ahead of United's Europa League final eight clash with Anderlecht, Mourinho spoke of the incident and how he is keeping solidarity with Dortmund but ensuring that his absolute main focus is football.
"Well, I try not to think much about it," he said on Wednesday afternoon.
"I try to focus on our job and to focus on what we love, which is to play.
"This is a quarter-final and we have to be focused on it and that's what we are trying to do.
"Obviously, there is solidarity with what happened yesterday, with the player that cannot play today, with the people that were scared.
"We have to trust the people that are working for our security. We have to believe that the match will just be what people want it to be, which is a very good match.
"I repeat, I try just to focus on the football."