ISLA VISTA, Calif. (KTLA) -- A UC Santa Barbara student from Los Angeles was killed and a young man was hospitalized after they fell from the second story of an apartment building.

It happened around 1 a.m. on Thursday at an apartment complex on Cordoba Road in Isla Vista.

Officials say 22-year-old Melissa Portillo was celebrating her birthday and was out on the balcony with 22-year-old Michael Kuster when they both fell.

Investigators say Portillo and Kuster were kissing against the railing when they fell.

Portillo suffered a head injury. She was taken to a nearby hospital, where she was pronounced dead.

Kuster is from the Netherlands and is here visiting friends.

He was taken to an area hospital in stable condition, where he was treated and later released.

According to a statement released by the Santa Barbara County Sheriff's Department, the incident appeared to be accidental.

Investigators believe alcohol may have been a factor.