The Queen has sent a message of condolence to the people of Nova Scotia following the deadliest mass shooting in Canada's history.
The head of state, who is also Queen of Canada, said her thoughts and prayers were with everyone affected by the "appalling" attacks.
A rampage by a gunman disguised as a police officer left at least 20 dead and homes in smouldering ruins in rural communities across Nova Scotia.
"Prince Philip and I have been deeply saddened by the appalling events in Nova Scotia, and we send our condolences to the families, friends and colleagues of those who have lost their lives," the Queen said.
"I also pay tribute to the bravery and sacrifice of the officers from the Royal Canadian Mounted Police and other police services who selflessly responded to these devastating attacks, and to the emergency services who are supporting those who have been injured and affected.
"My thoughts and prayers are with the people of Nova Scotia and all Canadians at this tragic time."
The Prince of Wales also sent his condolences to those affected by the "brutal, senseless attack".
Charles wrote: "Both my wife and I were profoundly shocked to hear about the devastating mass shooting in Nova Scotia.
"We wanted you to know that our hearts go out to the families and friends of all those who have so tragically lost their lives in such a brutal, senseless attack, and to those who have been so cruelly injured."
He expressed his admiration for the Royal Canadian Mounted Police, first responders and officials who went to the aid and support of the communities, which was "made all the more challenging with the ongoing hardships of the Covid-19 crisis and the loss of one of the R.C.M.P.'s own officers".
"Our special thoughts and prayers are with the victims' families, the people of Nova Scotia and all Canadians at this most heart-breaking of times," the prince added.
Australian Associated Press