Niall Horan's rumoured girlfriend Celine Helene Vandycke has reportedly received death threats after a photo of her with another man surfaced online. The One Direction singer and Vandycke were first linked when they were pictured kissing during the Mumford And Sons gig at the British Summertime Festival at Hyde Park in London on 8 July.

According to The Daily Mail, the photo shows Vandycke looking straight at the camera lens, while an unknown man stands behind her. The photo was captioned: "I present you guys my boyfriend Thomas !!"

The Twitter handle @HeleneVandycke which was used to share the photo has been suspended and the account has not been verified as belonging to Vandycke.

Soon after the photo of Vandycke with an unidentified man surfaced on social media, she was bombarded with nasty comments and even death threats from Horan's fans.

"Celine don't you ever cheat or hurt Niall or else I'll hunt you and kill you — make him smile and laugh. Mark this tweet Celine," a fan of the singer posted.

"Can anyone explain [to] me what the heck is going on? I saw some screen shots of Celine and her actual bf which wasn't Niall, feeling #heartbroken," another fan wrote.

"Niall and Celine were over so quick. Kind of makes me feel like she did something to him and that makes me irrationally angry," one other user tweeted.

Meanwhile, Horan was least bothered about the drama. "Stuck in traffic listening to @grimmers on a fine morning in landannn," he posted on his account.

According to E! Online, Vandycke is 25 years old and a graduate with a degree in European Law from the University of Exeter. She was born in Belgium and is currently studying Law at France's Université de Rennes.

Niall Horan
Niall Horan and Celine Helene Vandycke were first linked when they were pictured kissing during a Mumford And Sons gig  ReutersAndrew Burton