A Palestinian official said prisoners are threatening to restart a mass hunger strike Sunday, in protest of the fact that Israel, they claim, has not come through on promises to ease conditions for detainees.

A weeks-long hunger strike among some 1,600 Palestinian prisoners in Israeli jails ended last month after Israel promised to increase access to family members and end punitive solitary confinement, among other measures.

In return, the Palestinian prisoner leaders agreed to not engage in militant activity in prison or launch new hunger strikes.

“There are still provocations in the prisons, and the prisoners are threatening to resume the strike if the situation remains as it is,” Palestinian Minister of Prisoner Affairs Issa Qaraqaa said at a press conference in Ramallah.

“Israel has begun to violate the deal it signed with the prisoners, and within 10 days after announcing the end of the strike, Israel renewed administrative detention orders for approximately 30 prisoners,” Qaraqaa charged.