At least two persons, including a minor, were charred to death on Wednesday and another four injured when the raw materials used in preparation of crackers exploded in Kothapalli village in Vizag, police said.

G Nageshwara Rao, hailing from Anaparthi, had brought the raw material and stored it in a thatched shed in the village, Circle Inspector of Deverapalli Police Station Y Muali Rao said.

Around six to seven persons were preparing the crackers when the raw materials exploded.

While two persons - G Bujji (16) and K Rambabu (24) - died, four others sustained injuries, the officer said, adding that short circuit could be the reason behind the explosion.

The injured were admitted to hospital here and investigations are underway, police said.