Adnan's death is "the result of a policy of deliberate medical negligence, which is systematically practised by the Israeli occupation authorities," Arab League Assistant Secretary-General Saeed Abu Ali said, according to the Palestinian news agency WAFA.

Early on Tuesday, Israel Prison Service said Khader Adnan was found unconscious in his prison cell and was transported to a hospital where he was pronounced dead.

Adnan, 45, from Jenin in the West Bank, started his hunger strike on 5 February after being arrested.

Israel showed “a complete disregard for international and humanitarian charters and laws,” Abu Ali added, stressing that it was “an aggression against the most basic human rights.”

“By remaining silent the international community and concerned international organisations are encouraging the occupation to continue this criminal approach,” he continued, citing the deliberate and systematic medical negligence practiced by the occupation against Palestinian prisoners.

The Organisation of Islamic Cooperation (OIC) also condemned in a statement “the Israeli occupation’s systematic policy of medical negligence, arbitrary measures, inhumane treatment of Palestinian prisoners and deprivation of their basic rights guaranteed by the relevant international conventions and covenants.”

In the same vein, the Palestinian foreign ministry called for an international investigation into the death of Adnan, stressing that it will submit the file of "this crime" to the International Criminal Court (ICC).

Adnan, a father of nine, is the first prisoner to die “individually” in a hunger strike, the Palestinian Prisoner’s Society (PPS) revealed on Tuesday.

He was arrested 12 times during his life and went on strike several times in protest against this detention without any charge.

Adnan’s death has raised the death toll of Palestinian prisoners in Israeli prisons to 236, WAFA reported, noting that 75 of these deaths were the result of deliberate medical negligence.