The police said that among the explosives found were several mines.
The explosives and RPG were found inside a well in Illupukadavai in Mannar.
Illupukadavai was under LTTE control before the war ended in 2009.
Police Spokesperson Ruwan Gunesekara said the explosives are believed to have been hidden by the LTTE during the war period and after obtaining a court order, the army had destroyed it. (Colombo Gazette)