Chief minister Mamata Banerjee has suffered a hairline fracture above her left heel, doctors who have gone through several images of her injured leg at SSKM Hospital said on Thursday.

A temporary plaster has been applied to the area because the foot is still swollen. The chief minister has been advised to ensure her left foot takes as little of her body weight as possible to help faster healing.

Mamata is said to have asked the medical team treating her to let her leave by Friday.

If she is discharged on Friday, Mamata will have to confine herself to a wheelchair, a doctor said.