- A girl is killed and several other students are injured in the blast
- The device exploded in front of the vocational school early Saturday
- It is not yet clear who is responsible or why the school was targeted
Rome (CNN) -- A blast outside a school in the southern Italian city of Brindisi Saturday left one girl dead and injured several other students, the Italian news agency ANSA reported.
The explosion occurred early Saturday as students were arriving at the school, which offers vocational training, the news agency reported.
Investigators told the news agency two gas cylinders were connected to make the explosive device, which was placed on a wall in front of the building.
It is not yet clear why the school was targeted or who carried out the attack.
The Francesca Morvillo Falcone school is named after the wife of a prominent anti-mafia judge, however, leading to speculation that the organized crime group might be behind it.
Asked if there was a mafia link to the attack, Brindisi Mayor Mimmo Consales replied that there "are too many coincidences in this story," ANSA reports.
CNN's Joseph Netto contributed to this report.
