“We realize we face a tragic moment. We have to be calm and show solidarity.”

— Belgian Prime Minister Charles Michel.

“US will do whatever is necessary to help Belgium in this regard.”

— US President Barack Obama.

“We are at war. We have been subjected for the last few months in Europe to acts of war.”

— French Prime Minister Manuel Valls.

“These and other terrorist acts in different countries show that the Olympic values of understanding, respect and peace are more important than ever for our world.”

— International Olympic Committee President Thomas Bach.

“Our strength lies in our unity, and our free societies will prove to be stronger than terrorism.”

— German Chancellor Angela Merkel.

“The world must stand united to defeat terrorism.”

— Salem Al-Meslet, of High Negotiations Committee, a coalition of Syrian opposition groups.

“The attacks “have once again shown terrorism’s global face.”

— Turkish Prime Minister Ahmet Davutoglu.