Barack Obama briefed by counterterrorism adviser after gunman opens fire in Orlando gay club, killing many

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      Vancouverites are waking up to news of another mass shooting in the United States.

      Many people were killed after an early-morning shooting spree in a Florida LGBT club. Authorities initially reported that 21 people were killed. Shortly after that, information was updated to state that 50 people were killed and 53 were injured, according to the New York Times.

      Media outlets have identified the gunman as Omar Mateen, a U.S. citizen.

      He reportedly opened fire in the Pulse Nightclub around 2 a.m. in Orlando and was later killed by a SWAT team.

      According to the Gun Violence Archive, it's the 12th mass shooting in the United States this month. That works out to one a day.

      President Obama was briefed on the Orlando shooting by Lisa Monaco, the assistant to the president for homeland security and counterterrorism.

      The mass murder has prompted an outpouring of sympathy over social media for the victims.