A French Catholic high school was placed in secure mode Wednesday after a student brought a bullet shell casing on his ride to summer school.

Police received a call from Franco Cite shortly before 8:30 a.m. reporting a driver had found a shell casing on his school bus.

According to Roxanne Deevy, director of communications at the french catholic school board, the driver found the casing once everyone was off the bus.

"Once he found the bullet (shell casing), he immediately alerted the school administration and police," said Deevy. "Police then proceeded to investigate and question students."

At the time, there were 550 students between grades 7 and 12 from schools all over the city at Franco Cite, said Deevy. There was also a summer sports camp taking place in the gym.

Students, along with staff, were limited to inside the school and were not allowed to leave until just before 2 p.m.

Two students sitting in the seat where the casing was found were also questioned.

"It was discovered that one of the students had, in fact, brought a bullet (shell casing) from home," said Deevy. "But there was no gun on the student and no guns were found and there was only the one bullet."

Deevy confirmed it was a Grade 10 student responsible for bringing in the shell casing.

Because the summer school students came from all four of the city's school boards, Deevy said they were unable to send out an e-mail to parents alerting them of the incident.

As for the student, Deevy was told police would be talking to the student's parents.