A grizzly bear is on the loose after attacking a school group in Canada, leaving 11 people injured, two of them critically.The incident happened on Thursday afternoon on a walking trail in the town of Bella Coola, in the province of British Columbia (BC). Residents have been warned to remain indoors while armed officers try to track down the animal. Four of the injured remained in hospital as of Friday afternoon, BC’s Health Services Authority has said.A male teacher “got the whole brunt of it” and some children were hit with bear spray as the adults tried to fend off the animal, Veronica Schooner, a parent, told the Canadian Press.Ms Schooner said her 10-year-old son was part of the school group, though he was not attacked. “He said that bear ran so close to him, but it was going after somebody else,” she said, adding that “he even felt its fur”.British Columbia Emergency Health Services told the BBC in a statement that two people were critically injured in the attack, two more were seriously hurt, while seven others were treated at the scene.Patients had to be transported to a nearby airport so they could be airlifted to the closest hospital, officials said. The group were from Acwsalcta School, which is run by the Indigenous Nuxalk Nation in the remote town 700km (435 miles) north-west of Vancouver. “Officers are armed” the Nation wrote on Facebook. “Remain indoors and off the highway.” It added: “It’s hard to know what to say during this very difficult time. We are so grateful for our team and our students.” The Nation’s officials have temporarily shut the school and are offering counselling services. …