Police say they've arrested and charged a man who was carrying an explosive device during Tuesday's protest against tuition fee hikes in Montreal.

Montreal police spokesman Sgt. Dany Richer said the man was apprehended around 5 p.m.

Richer said more serious charges were laid after police carried out an investigation after the arrest.

Denis Marc Pelletier, 29, has been charged with possession of explosive devices, possession of arson devices, uttering death threats and inciting terrorist activities.

He was arraigned Wednesday and will remain behind bars until his bail hearing on Thursday morning at the Montreal courthouse.