Police are searching for two teenagers reported missing after being dropped at school, with the boy’s family sharing screenshots of the eerie last texts they received from him.

On Monday afternoon, SA Police confirmed a missing-persons report had been filed for Callum Schiller, 14, and his girlfriend Crystal, 14, who were last seen on a bus to the Adelaide Hills suburb of Mount Barker at 10.15am on Monday.

In a desperate plea to find Callum, his family took to social media on Monday to ask anyone who might have seen the boy to contact them.

“We have no idea whether he has caught a linking bus or is in Mt Barker,” his sister Ebony Schiller wrote on Facebook.

“Callum is uncontactable.

“Last messages include: he can’t see, he’s in a boot, he can’t say anything or he will get hit.”

SA Police confirmed officers from the Murray Bridge Police station were investigating the matter and the validity of the text messages sent.

Ms Schiller, speaking alongside her father, told NCA NewsWire he went missing alongside his girlfriend Crystal, also 14 after they were dropped off at school.

“They were dropped off at school this morning at about 8.30am, but they never went in,” she said.

She said they bought bus tickets to Mount Barker from the Murray Bridge Information Centre, but weren’t seen on any other CCTV footage.

“Police said they were going to search a property in the city, but we don’t recognise the name of the person who owns it,” Ms Schiller said.

Callum’s father Chris Schiller said he hoped the texts weren’t true, but that he didn’t think his son would make that kind of joke.

“He’s never done anything like this before, it’s very out of character so we’re very concerned,” he said.

“We hope everything is okay.”

The teens were last seen wearing Murray Bridge High School uniforms.