Toronto police headed to Forest Hill Collegiate yesterday to interview students as part of their investigation into the disappearance of Mariam Makhniashvili.

This is the third time investigators are speaking to students at the high school, where police have already held two special assemblies asking students to come forward if they have any information.

However, this time about 20 officers will speak to students individually about the case.

“They have a series of questions they’re asking the students,“ said school principal Peggy Aitchison. “I think the idea is to try to narrow down to maybe a nucleus of students that may might have been in the area where Miriam was the day that she went missing, and maybe have an in-depth conversation then with those individual students.”

Mariam, who was 17 when she disappeared, had only been at the school for four days before she went missing and most students told police they had never spoken to her.

She was last seen Sept. 14 when she told her brother she was entering the school through a different door than he was. But Miriam never made it to class and has not been seen since.

The only clue so far has been Mariam’s backpack, which was found a few kilometres from where she was last seen.

Police have also been conducting a door-to-door canvass, and last week searched a transfer station that handles the area’s garbage.