As concertgoers left the venue in a panic, local authorities warned people to stay away from the area, confirming that there was a "serious incident".
"Emergency services responding to serious incident at Manchester Arena. Avoid the area. More details will follow as soon as available," they wrote via Twitter.
Fans took to social media to document the hysteria surrounding them as the deadly blast took place.
Billboard has confirmed that Ariana is "okay" after the incident.
The attack is currently under investigation by authorities.
Source: Girlfriend.