The campaign, which is an umbrella organization for NGOs supporting the Palestinian cause both in the Arab world and across the globe, issued the call on Monday.
It also asked social media users to tweet an Arabic hashtag, which roughly means “empty bowel battle,” and upload Hungry for Freedom photos.
The campaign further urged people to record shorter than one-minute messages in solidarity with the hunger-striking Palestinian inmates.
At least seven Palestinians have remained on an open-ended hunger strike in Israeli jails to denounce their indefinite detention based on “secret information” with no trial or indictment.
The prisoners include Kayed Fasfous, Miqdad Qawasmeh, Alaa Aaraj, Hesham Abu Hawwash, Shadi Abu-Akr, Ayyad Hureimi, and Rateb Harebat.
Fasfous and Qawamesh are in currently critical health conditions and at risk of losing their lives.
“The [Israeli] occupation continues its intransigence and refusal to respond to their demand of ending their administrative detention, in an attempt to bring the striking prisoners to a difficult and dangerous health stage,” the Palestinian Prisoners Society said.
More than 7,000 Palestinians are reportedly held in Israeli detention centers. Hundreds of them have apparently been incarcerated under administrative detention.
Palestinian inmates regularly stage hunger strikes in protest at their arbitrary detention and harsh conditions in Israeli prisons.