The clash broke out between at least three MPs of government and opposition when the Minister Sarath Fonseka made comments about the personal protection of Rajapaksa.
The opposition complained over the removal of Army protection to Rajapaksa to replace them with the police.
Sandith Samarasinghe an MP representing the government had received blows as he had fallen to the ground having caught in the middle of an exchange of blows between two others, sources said.
The house sittings were adjourned by Jayasuriya until tomorrow.