A group of high school students from fell through a utility grate in a freak accident on on Thursday, with three requiring transport to the hospital as a precaution.

The incident happened during a tour of the campus, according to a press release from Virginia Tech, which reported that the group had reached Pamplin Hall on its tour, and as the students were gathered outside the building, 10 students who were standing on a utility grate near the atrium windows fell through the grate.

The students were able to get themselves out, per the release. Emergency services arrived on scene and evaluated the students for injuries. Three were transported to a nearby hospital for further assessment as a precaution. Seven were treated on scene.

Additional students on the tour were relocated to nearby Derring Hall and offered services.

The group later resumed its tour.

The condition of the three students who were transported is currently unavailable.

The area where the grate collapsed has been barricaded for further evaluation. Similar locations around the Blacksburg campus are also being evaluated.