At least 50 dead In Orlando gay club shooting suspect pay allegiance to ISIS Official Say

The massacre at an Orlando gay nightclub early this morning has been described as a "domestic terror incident," with at least 50 dead and 53 injured, officials said, making it the worst mass shooting in U.S. history and the deadliest terror attack on U.S. soil since the events of Sept. 11, 2001.

According to an ABC reporter the shooter has been identified by officials

as Omar Mateen of St. Lucie County, Florida, a U.S.-born citizen with Afghani parents. After the shooting began, he called 911 to pledge his allegiance to ISIS, according to law enforcement officials.

ISIS supporters have cheered the massacre online and an ISIS communique referred to the shooter as an ISIS "fighter," but there’s no evidence that ISIS directed or had prior knowledge of the attack, terrorism observers told ABC News.

The FBI also said Mateen "was organized and well-prepared," adding "he is not from this area."

Mateen's parents were born in Afghanistan, and he was "on the radar" of U.S. officials for some time, but was not the target of a specific investigation, law enforcement officials told ABC News.

A police officer working at the club exchanged fire with Mateen outside of the club at 2:02 a.m., officials said at the news conference. Mateen then entered the club.

It turned into a hostage situation shortly thereafter, when Mateen took hostages. He was armed with an assault rifle, handgun and "some kind of device on him," officials said.

At approximately 5 a.m., the SWAT team made the decision to rescue the hostages, officials said. The shooter was killed in a gunfight with those officers. Eleven Orlando Police officers exchanged gunfire with the shooter, according to an FBI spokesman.

Orlando Regional Medical Center, located near the nightclub, said it received "several gunshot victims," in a statement released at 5 a.m.

The statement read, "Orlando Regional Medical Center was placed on lockdown around 2:00 a.m. after receiving several gunshot victims. Only essential workers are being allowed access into the building. Out of an abundance of caution, Arnold Palmer Hospital and Winnie Palmer Hospital have also been placed on lockdown."

Later in the day, President Obama called the Pulse massacre "an act of terror and an act of hate." He called Mateen "a person filled with hatred."

The president also stressed the resilience of the people in his state. "We're going to do everything we can to help bring the community together," he said.

All this happen at United State time hours.

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