Concertgoers were sent fleeing on Wednesday when a fierce hail storm broke out during a Louis Tomlinson concert at Red Rocks Amphitheatre in Morrison, Colorado, a western suburb of Denver.

One video posted to social media shows the frightening amount of hail that fell in a relatively short amount of time.

Officials say that at least seven audience members were treated at a local hospital with non-life threatening injures. Some suffered broken bones from falls and instances of being trampled, CNN reported.

But other reports claim that nearly 100 were injured by the hail and the scramble to get to shelter.

One concertgoer, Bella Oliveira, said she saw people falling and being run over by people fleeing the hail.

“I managed to hide where they were selling drinks and I used my backpack to protect myself and another girl,” she said.

The storm delivered several inches of rain along with golf-ball-sized hail, according to the National Weather Service office in Boulder. It was also estimated that the storm generated estimated wind gusts of up to 50 mph.

The NWS even tagged the concert venue in its warning tweet.

For his part, signer Louis Tomlinson, a one-time member of the boy band One Direction, said he would return.

“Devastated about the show tonight, hope everyone’s ok, I’ll be back!” he tweeted. “Even though we didn’t play the show I felt all of your passion! Sending you all love!”

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