Stormzy cancelled his headline performance at Snowbombing Festival in Austria hours before he was due to take to the stage after claiming members of his team had been racially profiled.
The grime artist was expected to perform on Thursday night (April 11) but organisers announced he would no longer be appearing on Twitter.
Snowbombing regrets to inform you that Stormzy will no longer be performing at the festival this evening. For more information please click the link https://t.co/gjLA6VBJNj— Snowbombing (@Snowbombing) April 11, 2019
The 25-year-old English rapper has now taken to social media to tell his followers why he cancelled the appearance.
In a series of Instagram stories, Stormzy claimed his manager and friends were "targeted" by security because they had "reason to believe someone was carrying a weapon".
The rapper said that his team was targeted, "despite no one fitting the description".
He also accused the security of being physically aggressive.
Stormzy wrote: "My manager and all my friends who were at the festival were racially profiled, targeted and aggressively handled because they had reason to believe someone was carrying a weapon.
"The security targeted them (despite no one fitting the description), were physically aggressive when handling them and there's been no effort from the festival to actually deal and address the problem."
The grime star told fans he had to take "drastic steps" and cancel the performance to make a point about racism and racial profiling.
The south London rapper apologised to his fans who have missed out on seeing him perform.
He wrote: "My sincerest apologies to anyone who travelled all that way to watch me perform.
"I'm genuinely upset that you've wasted your time and money and that burns me more than you'd know.
"The last ever thing I wanna do is let down anyone who's taken time out to support me."
A spokesperson for the festival said they were "deeply saddened" by Stormzy's decision but that their staff had acted "in accordance with protocol".
A statement from the festival said: "Snowbombing's security were alerted to the possibility that an individual at the festival was allegedly carrying a weapon.
"In accordance with protocol, a small number of attendees, including Stormzy's manager were escorted to the nearest exit, searched and no weapon was found.
"Stormzy's management were unhappy with the manner by which this took place and as a result Stormzy will no longer be performing tonight."
Stormzy is among the headliners for this year's Glastonbury Festival.
He will be the first grime artist to headline the iconic festival and the first rap artist to get top billing since Kanye West headlined in 2015.
Stormzy's album, Gang Signs & Prayer, was named Best Album at the 2018 Brit awards.