ORLANDO, Fla. -- The FBI on Monday released a partially redacted transcript of the 911 call Orlando Pulse nightclub shooter Omar Mateen made during his June 12 rampage inside the club, which left 49 people dead.
"I let you know, I'm in Orlando and I did the shootings," Mateen told the dispatcher in the 2:35 a.m. call, according to the transcript.
The transcript also shows Mateen spoke to the dispatcher in Arabic and that he pledged allegiance to an organization and an individual during the call, but the transcript does not include those names.
It was previously reported that Mateen pledged allegiance to ISIS during a 911 call from the gay and Latino nightclub, according to a U.S. official.
The decision by U.S. Attorney General Loretta Lynch to redact the transcript was met with criticism from some, including Republican House Speaker Paul Ryan.
"Selectively editing this transcript is preposterous," Ryan said in a statement. "We know the shooter was a radical Islamist extremist inspired by ISIS. We also know he intentionally targeted the LGBT community. The administration should release the full, unredacted transcript so the public is clear-eyed about who did this, and why."
Authorities defended the decision, however, saying it was meant to avoid lending credence to terrorist leaders.
"We're not going to propagate their rhetoric, their violent rhetoric," FBI Special Agent Ron Hopper said.
He also said the decision not to release audio, or details of victims' calls to 911, was to avoid further traumatizing those who were inside the club.
"While we're not releasing the audio, what I can tell you is that while the killer made these murderous statements, he did so in a chilling, calm and deliberate manner," Hopper said.
In addition to the transcript, the FBI also released summaries of three calls between Mateen and crisis negotiators, one at 2:48 a.m., another at 3:03 a.m. and the final one at 3:24 a.m.
In those calls, which lasted a total of 28 minutes, according to the FBI's timeline, Mateen identified himself as an Islamic soldier and "told the negotiator to tell America to stop bombing Syria and Iraq and that is why he was 'out here right now.' "
"When the crisis negotiator asked the shooter what he had done, the shooter stated, 'No, you already know what I did,' " according to the document.
The timeline released by the FBI shows that the first call to police came in at 2:02 a.m. Within two minutes, officers were on the scene. At 2:08 a.m., officers entered the club and "engaged the shooter."
According to the timeline and Orlando police Chief John Mina, that's the last time shots were fired inside the club until nearly three hours later when police used explosives to blow a hole in the club's wall and an armored vehicle to enter the club.
By 5:15 a.m., Mateen was dead, according to authorities.
Mina and others defended the police response against what they said were misconceptions by some in the media and public about how events unfolded.
He said the initial engagement by officers minutes after the rampage began drove Mateen into hiding in a club bathroom and stopped the shooting.
He also said officers were in and out of the club, repeatedly rescuing people.
Hopper called the work of law enforcement officers that night "nothing less than extraordinary."
He said that authorities have no evidence that a foreign terrorist group directed Mateen's violent plot. Instead, they said, it appears he was radicalized domestically.
Investigators have conducted more than 500 interviews trying to determine his precise motive for the shootings, Hopper said.