GAZA CITY (Ma’an) -- Two prisoners announced Sunday that they will escalate their hunger strike action by refusing to drink water, a prisoners group said.

Kamal Issa, who is affiliated to Fatah, and Jamal al-Hour, from Hamas, will refuse both food and water as part of their strike action, Hussam Prisoners Assembly said.

In the past month, around 2,000 prisoners joined a group of administrative detainees on hunger-strike, according to prisoners groups' estimates.

They are calling for improved conditions in Israeli custody, such as an end to solitary confinement and bans on family visits, in addition to ending administrative detention.