Amy Yu, the 16-year-old teen who went missing in March, is missing once again after being put into a residential program for at-risk youth.

Yu left VisionQuest, a shelter for at-risk youth based in Greene Township, Franklin County, Pennsylvania with two other teens at 1:21 a.m. on Monday, according to Allentown Morning Call. The two other teens that left the residential program were identified as 17-year-old Nicole Richard and 16-year-old Ajah Linares.

The police department at Allentown, the city where Yu was from, have already been notified of her disappearance in case she shows up there. Allentown police Assistant Chief Gail Struss told the media that she’s unsure if the teen is considered to be in any sort of danger.

Back in March, United States officials – with the joint effort from ICE (Immigration and Customs Enforcement), the U.S. Marshals Service, and a Mexican law enforcement agency – managed to locate and bring home Yu after she voluntarily flew to Mexico with 45-year-old Kevin Esterly.

Yu was last seen wearing pants, a sweatshirt and a dark sneakers around the time of her disappearance. Police reports also suggested that the teens may have backpacks with them.

Featured image via YouTube / CBS Philly