NEW DELHI: At least four people were killed and five injured in an explosion at a firecracker factory near Sivakasi in Tamil Nadu on Tuesday. The blast occurred at a factory in Chinnakamanpatti.The injured have been admitted to a government hospital for treatment.“Four people died and five others were injured in an explosion at a firecracker factory in Chinnakamanpatti near Sivakasi. They were admitted to the Virudhunagar government hospital for treatment. More details awaited,” Virudhunagar district SP Kannan told news agency ANI.This is a developing story…