UPDATE 2/13/16 6:00 p.m.: Authorities investigating the deaths of two Arizona teens, identified as 15-year-old sophomore girls Mary Kieu and Dorothy Dutiel, now believe the crime to be a murder-suicide. As the Daily Beast reports, Dutiel posted a photo on Instagram late last year that seems to indicate the two girls were in a romantic relationship. "And now we're Sophomores. Today is our two year mark, and I love her dearly," she captioned the post. "I'm yours, May Kieu." Kieu also posted a photo from a few weeks prior with Dutiel captioned "my lover."

 

A police statement provided to BuzzFeed News also states the two are believed to have been romantically involved and that a suicide note had been located.

"Although the investigation is not complete, investigators working the case say evidence found at the scene leads them to believe that one female took the life of the other female before taking her own life. During the processing of the scene, a suicide note was located. Information gathered by detectives reveal the two girls were very close friends, appearing to also be in a relationship."

On Feb. 10, Dutiel tweeted "Rejected af." The following day, Thursday evening, she tweeted "Good bye."

Details surrounding the case and possible motive are still being investigated.

UPDATE 12:50 p.m.: Two 15-year-old girls have now been confirmed as deceased by local authorities. A weapon was discovered near the scene of the shooting, CNN reports. Additional details, including a possible suspect, have not been revealed.

See original story below.

A double shooting has been reported at a high school in Arizona, according to the New York Daily News. The shooting took place at Independence High School in Glendale early Friday morning, with ABC 15 reporting that one person is dead and another injured. The school is currently on lockdown, FOX 10 Phoenix reports, and authorities asking concerned parents to please gather at a nearby Walmart parking lot to await additional updates.

"I can confirm there has been a double shooting at the high school," a police official tells KPHO. "Don't have a lot of details yet. I'm heading to the scene." The shooting reportedly took place just as classes were set to get underway, though the exact location of the tragic act of violence has not been revealed. The incident, according to multiple reports, is not believed to be an active shooter situation. "Our hearts go out to everyone at Independence High School this morning," Glendale Mayor Jerry Weiers tweeted shortly after the shooting took place. Police have not confirmed the conditions of the alleged victims.

This story is developing.