From The Atlantic:

Government buildings on Parliament Hill in Ottawa, Canada, are on lockdown after a shooter opened fire on Wednesday morning just before 10 a.m. ET, wounding one military officer. Reports indicate the victim is a Canadian military member who was standing guard at the Tomb of the Unknown Soldier, he has been taken to the hospital. Police confirm they have killed one gunman, but reports indicate there may be more than one shooter still on the loose. This news comes after a hit and run in Canada, which resulted in the death of one military member and the injury of another, became a potential terrorism incident.