HIGHLAND PARK, Ill. — Five students are in custody following a lockdown Tuesday at Highland Park High School due to reports of a gun in the school.

City officials said no shots were fired and the lockdown has been lifted.

In an email to parents, District 113 Superintendent Bruce Law said the school received a tip that a student had a gun in school.

As police investigated the school, another student came forward saying they saw a student with a gun.

Minutes before the school went on lockdown around 10:45 a.m., more than 100 students staged a walkout, calling on lawmakers to support a ban on assault weapons.

“It’s haunting to know that I watch a hundred kids walk into school where there was a box of ammo, possibly a person with a gun,” said Ashbey Beasley, a parent who was present supporting the students who took part in the walkout. 

Five students were taken into custody as a result and circumstances around the incident are not known at this time. The school is being dismissed early.

The soft lockdown at other public buildings in the area, including elementary schools, has also been lifted.