Visit here for full coverage of the Orlando mass shooting.
UPDATE: Officials said that the weapon used in the attack was a Sig Sauer MCX assault-style rifle instead of the AR-15.
Investigators are starting to piece together information regarding weaponry used in mass shootings of late.
Orlando police said Omar Mateen—the gunman that killed over 50 people at Pulse, a gay nightclub, in Orlando, Fla., in the early hours of Sunday morning—carried out the killings using an AR-15-type assault rifle.
This is the same weapon used by gunman Adam Sanza in the 2012 Sandy Hook elementary school shooting that killed 26 people, including 20 children.
Similarly, James Eagan Holmes used an AR-15 in the 2012 Aurora, Colo., movie theater shooting that killed 12 and injured 58.
The AR-15 is a semi-automatic rifle that looks like a military weapon, but is advocated by the National Rifle Association as being customized for hunting and sports shooting rather than assault.
