Portland police say a student on board a bus was wearing a tactical vest and carrying rifle magazines that turned out to be for an airsoft rifle.

Police said the student was on board a bus traveling from Scarborough to Baxter Academy around 8 a.m. Thursday. The bus driver alerted the school after the student was seen donning a black tactical vest with the magazines attached. The school then called 911.

The 17-year-old male, who’s a Baxter Academy student, was also found to have a butterfly knife and CO2 cartridges with him.

The student was released into the custody of his parents. A decision will be made on any potential criminal charges.

Anyone with information about the incident is being asked to contact police.