About 150 death-row prisoners in Sri Lanka began a starving strike to request their sentences be commuted, prison officials said, after the nation’s president pardoned a former lawmaker who had been condemned for an election-related killing.

The lawmaker’s surprise release Thursday after he was pardoned by President Gotabhaya Rajapaksa has drawn widespread criticism, including from the UN human rights office and the US ambassador in Sri Lanka.

Duminda Silva is widely seen as a favorite of Sri Lanka’s ruling Rajapaksa family and had been serving a death sentence over the killing of a rival lawmaker from his own party in an election-related attack about 10 years ago.

About 150 inmates sentenced to death were striking, demanding their sentences be commuted to life terms, prison spokesman Chandana Ekanayake said Friday.

He said prison officials were discussing with the Justice Ministry and other government officials to resolve the issue.

Sri Lankan prisons are highly congested with more than 26,000 inmates crowded in facilities with the capacity of 10,000.

Unrest related to COVID-19 erupted in one prison last year, and at least eleven inmates were killed and more than 100 wounded when guards opened fire to control the unrest.

Sri Lanka has not hanged a prisoner since 1976 even though courts routinely pass death sentences. Rajapaksa’s predecessor, Maithripala Sirisena, had vowed to end the moratorium on capital punishment and to use it against those convicted of drug crimes.

Prison officials hired two executioners to carry out the hangings, but none took place during Sirisena’s tenure.