Omar Mateen Photos: Orlando Shooter, 29, Is Omar Mir Seddique Mateen Of Port St. Lucie, Florida

Paula Mooney

Omar Mir Seddique Mateen is the name of the Orlando shooter who killed 50 people in the Pulse Orlando gay nightclub. According to Heavy, Omar Mateen exchanged gunfire with police outside of Pulse Orlando at approximately 2 a.m. before entering Pulse Orlando and taking hostages. Update: Mir Seddique is Mateen's father.

"OMAR MIR SEDDIQUE MATEEN was born 16 November 1986 and he lives (or lived) FORT PIERCE, St. Lucie County, Florida, U.S.A. His voter ID number is 114484524. He registered to vote 19 July 2006 and he is registered in the Florida Democratic Party. He is listed as Other (race)."

Reaction to Omar's name being released as the Orlando shooter is being buzzed about on social media.

As a result of the tragedy, Orlando is the top trending Twitter item, with more than 517,000 tweets about the city. The violence has also caused #GunControlNow to become a popular hashtag, with more than 11,000 tweets about the term flowing into Twitter.

Other popular hashtags that have emerged on Twitter in the wake of the attack from Mateen include the label #MassShooting, which has gained more than 3,200 tweets in a short period of time. Also trending is the word Muslims, along with O Negative, because of the blood types that folks are being urged to donate in the wake of the mass shootings, including other much needed blood types.

On the Pulse Orlando Facebook page, requests for prayers and information about forthcoming data has been posted.

"As soon as we have any information we will update everyone. Please keep everyone in your prayers as we work through this tragic event. Thank you for your thoughts and love."
"I was there. Shooter opened fire @ around 2:00am. People on the dance floor and bar got down on the floor and some of us who were near the bar and back exit managed to go out through the outdoor area and just ran. I am safely home and hoping everyone gets home safely as well."