National Freedom Front (NFF) leader Wimal Weerawansa was taken to the Prison Hospital a short while ago.
The former Housing and Construction Minister is on a hunger strike, protesting the Colombo High Court refusal to grant him bail.
Weerawansa is being held on charges he caused the government a loss of Rs. 91 million by misusing state-owned vehicles.
The former Minister had released as many as 40 vehicles for the use of his family and friends.