Houler Akhwarzi is one of the leaders at the leisure center Underground and when her brother Ivan got "a little angry" before the demonstration, she got him thinking differently.

- He calmed down and said he would do what he could, says Houler Akhwarzi.

Ivan Akhwarzi then decided to organize a prayer in the middle of the square.

- I wanted to show that we are strong.

We were all together, Muslims and Christians, in front of what is happening, says Ivan Akhwarzi.

In the clip, you hear about the siblings' thoughts about what happened in other places.