Donate blood to help the victims of the Orlando nightclub shooting

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Long lines at Florida blood donation centers. (Courtesy: astrostorch / Instagram)

Hundreds of people in Orlando have lined up to give blood to help the victims of the massacre at a gay nightclub.

Officials at OneBlood say they have received such an overwhelming response that they are now asking donors to come back over the next several days. More than 50 people were injured and 50 were killed when a gunman opened fire inside a gay nightclub in Orlando early Sunday morning.

In the hours after the worst mass shooting in U.S. history, officials urged people to donate blood to help the victims.

In December, the nation's three-decade-old ban on blood donations from gay and bisexual men was formally lifted, but there are still major restrictions to limit who can give blood. The Food and Drug Administration said it replaced the lifetime ban with a new policy barring donations from men who have had sex with a man in the previous year.

Anyone in the metro Atlanta who wishes to donate can learn more by going to the Red Cross or Atlanta Blood Services websites.

Click here for Special Coverage: Orlando Nightclub Shooting