Sri Lanka, Aug. 23 -- Former President Mahinda Rajapaksa today expressed his disappointment over the imprisonment of former President Ranil Wickremesinghe, describing it as an act of political revenge.

Speaking to the media after visiting Wickremesinghe at the Welikada Prison today, Rajapaksa said the former President appeared calm and unconcerned about his situation.

"As far as I see, Ranil Wickremesinghe does not care much about what has happened to him. In politics, we sometimes have to face these kinds of situations," Rajapaksa noted.

He said it was unfair to imprison political leaders, especially former Presidents, over minor incidents.

"This is not right. It is wrong to imprison former Presidents who have held executive powers. ...