A northwest suburban high school was placed on lockdown Friday morning after an anonymous call to the school reported that a student might be in possession of weapon.

The call was received about 7:25 a.m. Friday to the main switchboard at Maine South High School in Park Ridge, according to Park Ridge police.

“The caller told a school administrator that a student off campus might be in possession of a weapon,” an email sent to parents by Supt. Ben Collins said.

Police were contacted, and administrators put the school on soft lockdown about 7:48 a.m., meaning students maintained their “normal class schedule without anyone else permitted into the building,” Collins wrote.

Police found the student at home about 8:25 a.m. and the lockdown was lifted, allowing students and staff to resume their normal schedule.

Park Ridge Deputy Police Chief Lou Jogmen said police are speaking with the student, but no charges had been filed as of early Friday afternoon.

Police, District 207 and school officials “are continuing to look into the matter,” Collins wrote. “At no time were students or staff in danger.”

School officials did not immediately respond to requests for comment.