The police are investigating the explosion inside a shop at Akuressa this morning, the police med unit said.
According to the police one person employed at the shop was injured in the explosion.
A special team trained under the police Special Task Force is carrying out the investigations into the blast, the police media unit said.
Investigations had found that a large amount of fire crackers stored in the shop under poor conditions led to the explosion.
The Akuressa police are assisting in the investigations.