Law enforcement officials are seeking the public’s help in locating a missing  Los Angeles-area teenager who was last seen in Valencia.

The Los Angeles Police Department is seeking information about the whereabouts of Andre Portier Jr., 19.

Portier was last seen in the 26000 block of Magic Mountain Parkway on Saturday, June 25 at approximately 7:30 p.m., a news release by the LAPD said.

He is described as a black male, with black hair, and brown eyes. He stands about 6 feet tall and weighs around 135 pounds. He was last seen wearing a grey/navy blue shirt, grey pants, and black shoes.

“He has not been seen or heard from since (June 25),” the news release said, “and his family is extremely concerned for his welfare.”

Portier does not have a history of disappearances, said detective Thomas with the LAPD.

“This is the first time,” Thomas said.

Portier was visiting Six Flags Magic Mountain as part of a church trip when he went missing, said the detective.

“He was with a church group,” Thomas said.

Anybody with information about Portier’s whereabouts is encouraged to call the Los Angeles Police Department’s missing persons unit at 213-996-1800.

Anyone wishing to remain anonymous should call Crime Stoppers at 800-222-TIPS (800-222-8477). Tipsters may also contact Crime Stoppers by texting to phone number 274637 (C-R-I-M-E-S on most keypads) with a cell phone. All text messages should begin with the letters “LAPD.” Tipsters may also go to LAPDOnline.org, click on “webtips” and follow the prompts.