The toll in a blast at an illegal firecracker factory in West Bengal’s Purba Medinipur district rose to 11 as one more person, who was seriously injured in the explosion, succumbed to his injuries, a senior official said on Saturday.

Rabindranath Maity, who had 80 per cent burn injuries, was undergoing treatment at the state-run SSKM Hospital here, died on Friday, he said.

"He had third-degree burn injuries. His condition deteriorated constantly since he was brought here and he died last evening," the official said.

Another injured in the explosion, Pinki Maity, is undergoing treatment at the hospital and his condition is also "very critical", he said.

Prime accused and owner of the illegal firecracker manufacturing unit Kalipada alias Bhanu Bagh had succumbed to his injuries at a private nursing home in Odisha's Cuttack, where he had fled soon after the blast on May 16.

The West Bengal CID is conducting a probe into the explosion in Egra area.

Meanwhile, the National Human Rights Commission (NHRC) on Friday issued a notice to the West Bengal government, seeking a detailed report on the explosion within four weeks.

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