Law enforcement was called out and the school was evacuated after reports surfaced about the grenade.
Speaking in the Senate on Tuesday, Minister Dillon said it turned out to be nothing more than a hoax.
"Based on information from the Commissioner of Police, it was in fact a hoax. It was not a real device. It turned out to be a cigarette lighter in the shape of a hand grenade. But I also want to take this opportunity to compliment the residents of Point Fortin for what I call their patriotism, for understanding and taking the message that we have been sending from the Ministry of National Security - if you see it, report it."
Unfortunately, the misplaced keys at the Port of Spain Prison were not a joke.
The Minister said Acting Assistant Commissioner of Prisons Dennis Pulchan has been appointed to look into the matter.
He added that only senior prison officers will handle keys.
"Effective monitoring and full compliance of the proper handling of keys and in fact, handing over of keys to only senior officers of the rank of Prison Officer II and above, efficient mastering of all cell gates at night, enhanced security of all lock down areas, ensuring that the handover of keys is done by senior officers with proper scrutiny and revised methods of checking. Only the Supervisor will handle the master key for all cell gates."
The National Security Minister also addressed the murder rate, which now stands at 110, increased maritime security through coastal patrols, as well as the appointment of a Police Commissioner which he believes will boost police morale to fight crime.