Vetlapalem, March 1 -- As many as 21 people were killed and eight others were critically injured in the cracker unit blast in Kakinada district of Andhra Pradesh on Saturday, state minister Kandula Durgesh said. "As far as I know, 21 bodies are seen here (at the site). Another eight people are undergoing treatment in hospitals. Approximately, there were 30 people in the unit," the minister told reporters. "This is the biggest blast in the state. Full details are yet to come. There is no chance that anyone would survive. Some people are undergoing treatment," he said. The blast occurred around 2pm. The minister further said officials are inquiring into the cause of the fire, which led to the blast.P4...