9 year old girl bring a hand grenade to an primary school in Morelos, a state in central Mexico, authorities mentioned.
Officers at the school within the city of Cuautla called the urgent situation answer number and informed operators on the list of an explosive product.
Military troops, laws administration agents from different federal, state and municipal divisions, fire-fighters and urgent situation management office personnel went to the Otilio Montano school.
School staff handed on the grenade to emergency personnel.
A number of fourth-grade students informed professors that a classmate had a explosive device, prompting school staff to find students' belongings, school administrators mentioned.
The grenade, which even now had the fuse in it, was found in the girl's backpack, school administrators mentioned.
Investigators are trying to find out where the grenade came from and how the girl ended up with the military weapon.
Army specialists are working to determine if the grenade is active.