ABC News August 28, 2018

Teen girl in 'romantic relationship' with high school wrestling coach, both reported missing: Sheriff

WATCH: Missing teen girl, high school wrestling coach in 'romantic relationship': Sheriff

A teenage girl is in a "romantic relationship" with a former California high school wrestling coach, and both are now missing, according to authorities.

The unnamed 16-year-old, a junior at Franklin High School in Stockton, Calif., is believed to be with 25-year-old Phillip Maglaya, a former wrestling coach at Franklin High School, according to the San Joaquin County Sheriff's Office and the Stockton Unified School District.

(MORE: Missing Florida teen found with soccer coach in New York has 'emotional reunion' with family)

The two were "in a romantic relationship," the sheriff's office said Saturday.

The teen was reported missing on Aug. 22, the sheriff's office said.

San Joaquin County Sheriff's Office
An undated photo of 25-year-old Phillip Maglaya, who is believed to be with a missing teenage girl.

“The Stockton Unified School District is working closely with law enforcement," the school district said in a statement. "The San Joaquin County Sheriff’s Department is in charge of this case and the district will not be discussing the student."

"It has been reported the student may be with a volunteer walk-on coach, 25, who worked at the high school for several weeks last winter," the district's statement said. "The volunteer coach was unpaid, but did pass background checks. He had advised the school he would not be returning this year."

The teen and coach are believed to be traveling in a 1994 green Toyota extra cab truck with license plate 8G91493, the sheriff's office said.

Authorities released this photo of a similar truck:

San Joaquin County Sheriff's Office
A photo of a truck similar to the vehicle 25-year-old Phillip Maglaya, who is believed to be with a missing teenage girl, may be traveling in.

Anyone with information is urged to call the San Joaquin County Sheriff’s office at (209) 468-4400, or the Investigations Unit at (209) 468-4425.