From IOC President Thomas Bach:

“I learnt with great sadness and horror today of the brutal attack on a wrestling centre in the Afghan capital, Kabul, that has left more than 20 people dead and dozens wounded.  I strongly condemn this cowardly attack on young people and on sport. The young wrestlers were there as part of a peaceful competition, and this is a direct attack on sport itself and its values. Their deaths go straight to our hearts, and these innocent victims and their friends and loved ones are in our thoughts this evening. We mourn together with them, and I would like to express our deepest sympathy and condolences, from me personally and from the entire Olympic Movement.

The International Olympic Committee, together with United World Wrestling, has already begun to explore the best ways to offer immediate help and assistance to all those affected."

https://www.olympic.org/news/statement-from-the-ioc-president