Canadian police have said at least 13 people are dead after a gunman went on a 12-hour shooting rampage across Nova Scotia in the worst act of mass murder the country has seen in 30 years. A police officer was among the dead. Officials said the gunman, named as 51-year-old Gabriel Wortman, had also died after shooting people in several locations across the province. They said they were still trying to establish a final death toll. “Today is a devastating day for Nova Scotia and it will remain etched in the minds of many for years to come,” commanding officer Lee Bergman of the Royal Canadian Mounted Police said on Sunday evening. Authorities said Wortman was driving what appeared to be a police car and was wearing a uniform but later reported he was at the wheel of a Chevrolet sports utility vehicle that had been modified to resemble a white RCMP vehicle – “one that he has basically made himself”, said Brian Sauvé, president of the National Police Federation. Police have said the suspect was not an employee or officer with the RCMP. “In excess of 10 people have been killed,” RCMP Chief Superintendent Chris Leather said, before later revising the total to “at least 13”. “We believe it to be one person who is responsible for all the killings and that he alone moved across the northern part of the province and committed what appears to be several homicides.” Sauvé said a police officer was among those killed in a shooting and another was injured. The dead officer has been identified as Heidi Stevenson, a mother of two and a 23-year-old veteran of the force. “Heidi answered the call of duty and lost her life while protecting those she served,” Bergerman said on Sunday evening. “Two children have lost their mother. And a husband has lost his wife. Parents have lost their daughter and countless others lost an incredible friend and colleague.” The massacre looked to be the worst of its kind since a gunman killed 15 women in Montreal in December 1989. A man driving a van deliberately ran over and killed 10 people in Toronto in April 2018 and aa man shot dead six people at an Islamic cultural center in Quebec City in 2017. Police have not provided a motive for the attack, which reportedly began in the small Atlantic coastal town of Portapique, about 130km north (80 miles) of Halifax, the provincial capital. Online records show Wortman ran a denture clinic in the city of Dartmouth, across the water from Halifax. Portapique residents said the the first they heard about the incident was late on Saturday night when police urged everyone to stay indoors. Officers arrived at a house after receiving multiple emergency calls and found “several casualties”. One local resident said she had come across two burning police vehicles while out driving on Sunday morning. One man said he saw at least three separate fires. “There was one officer we could see on scene and then all of a sudden, he went running toward one of the burning vehicles,” Darcy Sack told the CBC. “We heard gunshots,” she said, adding that one police officer looked to have been injured. Police initially said Wortman was driving what appeared to be a police car and was wearing a uniform but later reported he was at the wheel of a Chevrolet sports utility vehicle. The RCMP released a photograph of Wortman on Sunday morning, warning he was “armed” and “dangerous”. “I never imagined when I went to bed last night that I would wake up to the horrific news that an active shooter was on the loose in Nova Scotia,” Stephen McNeil, the Nova Scotia premier, said on Sunday. “This is one of the most senseless acts of violence in our province’s history,” he added. He said it was an additional heavy burden amid efforts to contain the coronavirus. While police had not released the identities of the victims, resident Jenny Kierstead wrote on Facebook that her sister, Lisa McCully, was among those killed. “This is so hard to write but many of you will want to know. Our hearts are broken today as we attempt to accept the loss of my sister, Lisa McCully, who was one of the victims of the mass shooting in Portapique last night,” she wrote. “Our condolences go out to the other family members who are affected by this tragedy. Thank you for your support, it’s a hard day.” The prime minister, Justin Trudeau, speaking to reporters in Ottawa, deplored what he called “a terrible situation”. Tom Taggart, a lawmaker who represents the Portapique area in the municipality of Colchester, said the quiet community has been shaken. “This is just an absolutely wonderful, peaceful quiet community and the idea that this could happen in our community is unbelievable,” Taggart said by phone from his home in Bass River. Mass shootings are relatively rare in Canada, which has far tighter gun control laws than the United States. Sunday’s shooting also marks another grim milestone for the RCMP in the Maritime region. In August 2018, a man in the province of New Brunswick, which borders Nova Scotia, shot dead four people, including two police officers, in an apartment complex. In June 2014, in the same province, a man shot dead three police officers.