Detective Chief Inspector John Caldwell is fighting for his life in Altnagelvin Hospital after being shot multiple times by two masked New IRA gunmen.
The Catholic Bishop of Derry, Most Rev Dr Donal McKeown, said: “The attempted murder of the police officer last evening in Omagh is a wholly unjustifiable and appalling act.
“There can be no excuse for any attack on members of the PSNI and they deserve our support.
“Police officers carry out their duties on behalf of the whole community.
“My prayers are with the injured police officer and his family and those who are caring for him at this time.”
The Church of Ireland Bishop of Derry and Raphoe, Right Reverend Andrew Forster, said: “The attempted murder of a PSNI officer in Omagh, on Wednesday evening, was a crime against God and a crime against man.
“The fact that this happened in close proximity to children highlights the wickedness and recklessness of the perpetrators.
“I offer my prayers for the injured officer and his family, and pledge my support to his colleagues in the PSNI.
“I appeal to anyone with any knowledge about this crime to give the information to the police.”