A suspect was shot by armed officers responding to an "incident" on Friday in Scotland's largest city, Glasgow, police said.
Police Scotland did not mention any other casualties, but the BBC reported earlier that three people were stabbed to death in a stairwell to a hotel and that the suspect was shot dead.
Police Scotland Assistant Chief Constable Steve Johnson said officers had responded to a "contained incident and ... the wider public is not at risk."
"Armed police officers attended the incident and I can confirm that a male suspect was shot by an armed officer," Johnson said in statement.
"I would like to reassure the public that at this time we are not looking for anyone else in relation to this incident," he said.
"I can also confirm that a police officer was injured while dealing with the incident and that officer is receiving treatment in hospital."
Prime Minister Boris Johnson tweeted that he was "deeply saddened by the terrible incident in Glasgow," while Nicola Sturgeon, the head of Scotland's devolved government, said the reports were "truly dreadful."