"His health is not so good. He is not eating anything," he said.
A number of leaders including former President Pratibha Patil have visited Thackeray's residence 'Matoshree' over the past few days to enquire about his health.
Thackeray has been unwell for some time.
Last month, he could not attend his party's annual Dussehra rally, but addressed it through a video recorded message.