One of the two Temple University students, both 19, remains in a critical but stable condition in hospital after the incident on Saturday.

Two university students are in hospital after plummeting four floors from a rooftop while taking a selfie together during a party, say police.

The unnamed 19-year-old women were part of a gathering at an off-campus apartment building in Philadelphia, US, when they fell in the early hours of Saturday.

One patient suffered leg and ankle injuries during the incident at 2am, while the other is in critical but stable condition with multiple injuries.

A group of young women were seen crying at the scene in news footage.

Fellow students later complained the rooftop safety barriers are inadequate, while neighbours said they hoped the incident was a wake-up call.

Arnav Johri told the news outlet: “There’s not enough room blocking you from falling off, so if you’re drinking and you run right into it, it’s really easy to slip right off because it only comes to like a little halfway between your knee and hip.”

While one neighbour said the coronavirus pandemic has not deterred students from partying.

“Just hope that someone learns from their example not to be on the roof. It happens all the time,” Ada Banks said.

She added, the students are “still children at heart, and they have no fear”.

The building’s management company told 6ABC the rooftop is a deck with a parapet wall and railings.

Four years ago, Temple University student Ali Fausnaught was at a party a few blocks away from Saturday’s incident and fell after tripping on a 10-inch ledge around the roof, according to 6ABC.