Swati (5) and Anjali (8) were playing near their house when the wall collapsed, leaving them dead, police said.
Another girl from the same neighbourhood, identified as Payal, was injured in the incident, they said.
(REOPENS CAL3)
Two teams of the National Disaster Response Force
comprising about 80 personnel have rushed to the flyover collapse spot.
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NDRF Director General O P Singh said in Delhi that the teams are being sent from their local base at Rajarhat, near the Kolkata airport.
(REOPENS CAL3)
Chief Minister Mamata Banerjee, who was in Midnapore for election campaign, is arriving here cutting short her visit, official sources said.