The dailymail has a good write-up - including accounts from people who were on the same floor and in the next room by the shooter.
Thank you, they are excellent.
LVMPD Identifies Suspect in Sunday Night Shooting on the Strip - An Estimated 406 People Transported to Hospitals, 50 Dead
https://www.lvmpd.com/en-us/Press%20Releases/PO%20235%2010-02-17.pdf
‘I was in room 135 and I heard over the police scanner that the shooting came from room 137,’ said the man, who asked not to be named.
‘It was non-stop, I would say well over 100 rounds. We hit the floor and took cover. I called the front desk and she was remarkably calm and said she was aware of the situation and told us to stay in our room.
‘After around 10-15 minutes it just kind of stopped. You could smell the gun powder. Right before we got out I heard an explosion, maybe a flashbang, but windows were blown out.
‘The cops came on to the floor and they were clearing rooms room by room and six or seven cops came into our room and we were evacuated.’