Kolkata, Aug 2 - West Bengal Sports and Transport Minister and senior Communist Party of India-Marxist (CPI-M) leader Subhas Chakraborty, now under treatment at a private hospital here, is critical and has been put on ventilator, a hospital spokesman said Sunday.

Chakraborty, who was admitted to the AMRI Hospital in the satellite township of Salt Lake Tuesday night, has a malfunctioning kidney, besides severe heart problems.

'He came to the hospital with respiratory problem, an infected lungs and high fever. His heart is also not ok. So we have shifted him to ventilator,' the hospital's medical superintendent Debasish Sharma told IANS.

The minister would be given blood transfusion Sunday night for increasing the platelet count. 'Once that is over, we may go for dialysis,' Sharma said.