Kolkata, Jan 31 (PTI) Five persons were critically injured in gas cylinder blast at a residential building in south Kolkata's Ekbalpore area on Monday, police said.

The incident happened around 6.30 pm on the second floor of the five-storied building on Ekbalpore Lane, they said.

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"A mechanic went there in the evening after the family who lives in that building informed their cooking gas distributor of leakage," a police officer said.

The blast took place when the mechanic was repairing the leakage, he said.

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The mechanic and four members of the family, including two women, were injured in the blast, he added.

"All the injured persons are undergoing treatment at a private nursing home," the officer said.

(The above story is verified and authored by Press Trust of India (PTI) staff. PTI, India’s premier news agency, employs more than 400 journalists and 500 stringers to cover almost every district and small town in India.. The views appearing in the above post do not reflect the opinions of LatestLY)