A 24-year-old Czech university student opened fire in the university’s philosophy department building after first killing his father in his hometown outside of Prague. The gunman killed himself after the shooting rampage.

Among the injured were two people from the United Arab Emirates and one Dutch citizen.

Archbishop Jan Graubner of Prague expressed deep sadness in response to the shooting and said that priests in Prague are available to provide spiritual support via a hotline set up in response to the tragedy.

“I pray for the dead, their families, loved ones, and friends, and also for the healing of all the injured,” the archbishop said on Dec. 21.

“I am asking the Lord to bring comfort to everyone in this pre-Christmas season and to help overcome the pain and sadness.”

The Catholic Archdiocese of Prague will host a memorial Mass for the victims of the shooting on Dec. 23 at 11 a.m. in Prague’s Cathedral of Saints Vitus, Wenceslaus, and Adalbert, which will be open to all who wish to honor and pray for the victims.