Why 1 in 3 People at Pulse Were Shot

Authorities in Orlando Monday clarified the death toll from the Pulse nightclub shooting: The current total of 50 includes the gunman, Omar Mateen, reports the AP. Of those, 39 were dead at the scene. A surgeon at Orlando Regional Medical Center says the death toll is expected to rise given that most of the 53 people still hospitalized were in critical condition. Other developments:

• Why so deadly? The New York Times has an interactive graphic on why one in three people in the crowded club were killed or injured. Factors include the firing capacity of the AR-15 and the noise inside the club. One part that's not yet clear: whether Mateen killed more people as police prepared to confront him.
• The Orlando Sentinel has a striking front page: it has only one photo and an editorial headlined "Our Community Will Heal." See it here. An editor explains the decision here.
• The Sentinel also provides a timeline of events from the shooting, one that points out 30 people were rescued.

• USA Today also has a timeline, explaining how police set off an explosive device to distract Mateen and then used an armored vehicle to bust through a club wall.
• Mateen was "cool and calm" in discussions with police, says Orlando's police chief, per NBC News.
• In the wake of the shooting, Facebook employed its Safety Check feature for the first time in the US, reports ComputerWorld. The feature lets people notify loved ones they're safe in a crisis.
• BuzzFeed is providing information on the deceased as it becomes available.
• Another Orlando nightclub was the scene of a mass shooting in February, and Vice takes an in-depth look at that one.
• Catch up on previous developments here.

(More Pulse Orlando shooting stories.)