Forty-nine people are dead and at least 53 injured in the deadliest shooting in American history after Omar Mateen, a 29-year-old U.S. citizen, opened fire and took hostages inside the Pulse gay nightclub in Orlando, Fla.

What we know:

LGBT Muslims are mourning the Orlando shooting

When Faisal Alam, a Muslim activist in New York, first heard about the Orlando shooting, he cringed the same way many Muslims do when they learn that someone who may share their faith has killed innocent people.

"The shooter at the gay nightclub in Orlando has been named. And he has a Muslim name. :-/," Alam wrote on a Facebook post.

But the shooting has been especially difficult for Alam to process because he is a gay Muslim and has spent two decades working to support LGBT Muslims, such as through a national group called the Muslim Alliance for Sexual and Gender Diversity, or MASGD.

The shooting also happened during Ramadan, the holy Islamic month of fasting, and amid June LGBT Pride events across the country, making for an uncomfortable mix of faith, sexual identity and violence for many gay Muslims.

On Sunday, MASGD released a statement mourning the Orlando deaths.

"Many of us woke up today to news of a mass shooting at Pulse, an Orlando nightclub serving the LGBTQ community. Our thoughts and prayers are with the victims and their families. Our thoughts are also with our LGBTQ Muslim community which is feeling this tragedy and the response to it personally."

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