LIMA, Peru — A day after granting a medical pardon to former President Alberto Fujimori, who has been imprisoned for human rights abuses, Peru’s current president, Pedro Pablo Kuczynski, came under attack from both lawmakers in Peru’s Congress and from human rights experts.

Rights lawyers in Lima, the capital, say pardons and sentence reductions are not permitted for people tried for rights violations under the rules of the Inter-American Human Rights Court, which adjudicates some human rights cases in Peru and other countries that are members of the Organization of American States. Two of the cases brought against Mr. Fujimori were tried by the court.

“The pardon does not conform with the Inter-American Human Rights Court ruling,” said Francisco Soberón, director of the Pro-Human Rights Association, in Lima, which represents surviving family members of the cases.

Mr. Soberón said his group was preparing to file a report with the court seeking to have the pardon reversed.