West Bengal Chief Minister Mamata Banerjee, who suffered a ligament injury on her left knee, may undergo a surgery on Thursday, a source close to her said.

The TMC supremo, is scheduled to visit the state-run SSKM Hospital in the city for a check-up during the day and may undergo the operation, he said.

"There is a swelling in her left knee joint which might be due to excess fluid collection in or around that area. We need to see whether that requires surgery or not," a senior doctor, part of the team treating her, told PTI.

Banerjee was injured in her left hip joint too while alighting from a helicopter that made an emergency landing at Sevoke airbase due to bad weather last week. She was prescribed rest and restricted movement.

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