Palestinian minister Ziad Abu Ein was killed on Wednesday after a confrontation with Israeli Defense Force (IDF) troops at an anti-occupation protest in the West Bank.
Israel and Hamas agreed to an Egyptian brokered peace plan on Tuesday, causing celebrations on the streets of Gaza.
Fighting has resumed in Gaza after a 72-hour ceasefire came to a close with Hamas firing rockets and Israel using tanks, gun boats, and missiles strikes to hit targets within Gaza.
The 72-hour humanitarian truce between Israel and Hamas was over within hours, with 25 Palestinians killed in southern Gaza.
Israel has been blamed for killing 15 Palestinian civilians sheltering in a UN school in a day which saw 120 Palestinians killed and no end for the conflict in sight.