They also called on the European Union to "condemn the bombing by land, sea and air against the Palestinian civilian population in the Gaza Strip."
In the open letter, they demanded a cease-fire by the Israeli military and urged Israel to "lift the blockade, which the Gaza Strip has suffered for more than a decade."
The letter also said: "Gaza is living through horror these days, besieged and attacked by land, sea and air. Palestinians' homes are being destroyed, they are being denied water, electricity [and] free movement to their hospitals, schools and fields while the international community does nothing."
