Chief minister Mamata Banerjee stumbled on board a chopper while on the way to a campaign meeting on Saturday afternoon at Durgapur.
The nature of her injury is not known yet.
The chief minister was scheduled to leave for Kulti in Asansol-Burdwan.
On March 14, the chief minister sustained a deep cut on her forehead after a fall while at her Kalighat residence and was hospitalised.
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