CHICAGO (CBS)– Portage police say three teens robbed and shot Adriana Saucedo during a marijuana deal, and then “callously dumped” her body in an abandoned elementary school.

Adriana Saucedo (Credit: Facebook)

Saucedo, 27, of Portage, Ind., was reported missing on Thursday. Her body was found Thursday night at the Horace S. Norton Elementary School at 1356 Harrison Blvd. in Gary.

According to the Lake County Coroner, Saucedo sustained gunshot wounds.

According to Portage police, officers received information about a 15-year-old male who Saucedo had previously met on Facebook. He was later detained by police.

“During the course of our investigation, our detectives identified two other subjects believed to (be) present at the time Ms. Saucedo was picked up from her home in what we understand to be a prearranged purchase of a small amount of marijuana,” Portage police said in a press release.

Police said the two other subjects were identified as a 16-year-old male and a 17-year-old male, both from Gary.

Portage police said they’ve detained the 17-year-old suspect and he’s been brought back to the police department. Officials said the 16-year-old has been detained at the Porter County Prosecutor.

Investigators determined Saucedo was shot inside the vehicle she was picked up in, and the incident appeared to be a robbery.

The three teens then drove Saucedo to the elementary school, where she was later found, police said.

Police also said the 16-year-old suspect was involved in a police pursuit with the Lake County Sheriff’s Office Wednesday, driving the car believed to be where Saucedo was shot. The teen crashed the vehicle in Gary, police said, fled on food and was arrested. He was taken to the Lake County Juvenile Detention Center and released with an ankle monitor.

Portage police are investigating.

This is a developing story.