Nabil Shaath, a member of the central committee of terror organization Fatah, was hospitalized Sunday in a Dutch hospital after suffering heart failure.
He was on a plane that had just taken off for Malaysia when he complained of chest pains. The pilots landed the plane back in Holland and medical crews took him to en Amsterdam hospital.
Shaath had been visiting Denmark, Sweden and Belgium to garner diplomatic support for the recognition of a state of Palestine at the United Nations.
In an Al Jazeera interview two months ago he said: "I've seen how peace could work ... I've seen how the Israelis can also be drawn into hope, a real hope that brings real results."