Fifth Harmony's Ally Brooke Hernandez was left terrified after a fan attack in Mexico.

Fifth Harmony

Fifth Harmony

The singer was performing with her bandmates when a man stormed the stage and tried to wrap his arms around her, just days after a fan tried to drag her to the ground at Monterrey airport in the country.

She told Entertainment Tonight: "I am thankful that I or anyone else was not injured, as these incidents could have gone awry, I love the fans and appreciate their excitement and love for us, however, these situations could easily escalate in the wrong direction for us and the fans."

"I am fine though. I love our fans and am excited to continue performing my heart out on our 7/27 Tour!"

After the airport incident, Ally took to social media to plea for fans to stay calm around the band.

She wrote: "Hi my loves, Just to let you know I am okay after the airport incident. Please be careful and gentle so no one gets hurt. That was scary! Thank you.

"Monterrey, I couldn't be happier to be here! It's been a dream of mine since I was little. My favorite singer Selena Quintanilla had many beautiful performances here. And now I get to perform in this city! I am beyond honored and proud. Te amo!!! Ally (sic)."

Meanwhile, Simon Cowell recently insisted the band will be "fine" - despite their recent troubles.

The American girl group have recently been plagued by reports of unrest, but Simon - who signed the band to his record label - has backed them to resolve their internal problems.

Asked what is going on with the five-piece group - which features Normani Kordei, Dinah Jane, Camila Cabello, Lauren Jauregui and Ally - Simon said: "Same with any group. You know, we have conversations about what they want to do. We've got to listen to them. It'll be fine. I hope."