FBI releases 911 calls from Orlando shooter

The FBI has released partial transcripts of calls the Orlando shooter made during his rampage at a gay nightclub.

Authorities say Omar Mateen spoke to police in a "chilling, calm and deliberate manner" as he swore allegiance to a terrorist organization.

Mateen killed 49 people at the Pulse nightclub just over a week ago.

US correspondent Steve Mort reports from Orlando.

IN: "The transcripts…
OUT: SOC
DUR: 52 seconds

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