Four months after California prisoners declared a hunger strike to protest solitary confinement and other abuse, they are still suffering retaliatory punishment at the hands of corrections authorities, the Prisoner Hunger Strike Solidarity Coalition announced Monday.

“We demand an end to retaliation, and those demands are entwined with continued political organizing work to change the system,” said Isaac Ontiveros, with the Prisoner Hunger Strike Solidarity Coalition and Critical Resistance, in an interview with Common Dreams. “It is the minimum of human decency to not retaliate against people who participated in the peaceful protest.”

Prisoners who participated in the California-wide prisoner hunger strike, launched July eighth, have been slammed with what are called a ‘115 write-ups.’ The penalty accuses the prisoners “of committing a serious rule violation” for participation in the hunger strike, according to a statement from the Prisoner Hunger Strike Solidarity Coalition.

The write-ups have serious consequences for inmates who can face years-long extensions of their solitary confinement and denial of parole as a result. “It is something that goes into your record, so that when you are reviewed for whatever reason around parole, moving from one place to another, it affects the nature of your imprisonment,” Ontiveros explains.

“People perceived as supporting the strike, whether refusing meals, refusing work, or supporting the strike with other action faced retaliation,” said attorney Caitlin Kelly-Henry in an interview with Common Dreams. “As many as 30,000 people are documented as refusing meals at the time the strike was declared. We don’t have numbers of people who refused work. It could be as many as hundreds or thousands of people who faced 115 and other write-ups.”

The 115 write-ups are part of broad retaliatory measures inflicted against prisoners who participated in the hunger strike, including searching cells, obstructing inmates’ communications with the outside world—including lawyers—punishing strikers with more severe solitary confinement, and intimidating inmates to prevent them from appealing the harsh measures. Prisons were also given the green light to force-feed hunger striking prisoners—a move that human rights advocates slammed as a gross violation of human rights.