JERUSALEM (AFP/Reuters) Hundreds of Palestinians clashed with Israeli security forces across East Jerusalem on Tuesday in the worst rioting in years as a senior Hamas leader called for a new intifada, or uprising. As the unrest rocked Jerusalem, US Middle East envoy George Mitchell delayed a visit to the region amid the most severe diplomatic row in decades between Israel and the US, which has been struggling to revive peace talks. In a statement, Hamas said Palestinians should regard Tuesday as a day of rage against the occupations (Israels) procedures in Jerusalem against Al-Aqsa Mosque. Hamas leaders cited the renovation of the Hurva synagogue, in the Jewish Quarter of Jerusalems walled Old City, saying that the restoration work was an Israeli plot to demolish Al-Aqsa Mosque, some 400 metres away. Police fired rubber bullets, stun grenades and teargas at protesters who hurled stones and set up barricades with dumpsters and burning tyres in several neighbourhoods. In at least one neighbourhood undercover Israeli police officers disguised as protesters wrestled demonstrators to the ground and handcuffed them. Forty Palestinians were taken to hospital, with fractured bones, eye and stomach injuries, and dozens more were treated on the spot, according to the emergency services of the Palestinian Red Crescent Society. Police said 14 policemen were hurt and 60 people arrested. Police spokesman Micky Rosenfeld said four officers were briefly taken to hospital and another 10 were treated on the spot, while 60 Palestinians were arrested. There were clashes in the Shuafat refugee camp and in several other parts of east Jerusalem, which Israel occupied in the 1967 Six Day War and later annexed in a move not recognised by the international community. As the rioting was under way Hamas deputy politburo chief Mussa Abu Marzuk called for another popular Palestinian intifada. The intifada must enjoy the participation of all of Palestinian society, he told Al-Jazeera television. Every Palestinian should rise up... against the forces of the (Israeli) occupation. In the Hamas-ruled Gaza Strip thousands of people took to the streets, chanting: With our blood, with our souls, we sacrifice for you, Jerusalem. Anger was already high among Palestinians over Israels announcement of plans to build 1,600 new homes for Jewish settlers in east Jerusalem. Mitchell postponed a visit to the region that was to start on Tuesday, the US embassy said. The reopening of a twice-destroyed Hurva synagogue in the Jewish quarter of Jerusalems walled Old City on Monday further fuelled tensions. Many Palestinians view Israeli projects near the flashpoint Al-Aqsa Mosque compound as an assault on its tense status quo or a prelude to the building of a third Jewish temple there. The OIC on Tuesday criticised Israels inauguration of the rebuilt synagogue, saying it risked dragging the region into a religious war. Rival Palestinian factions also united in condemning the high-security opening of the synagogue. This is no mere synagogue, said Hatem Abdel Qader, the official in charge of Jerusalem affairs for Palestinian President Mahmud Abbas Fatah movement. This synagogue will be a prelude to violence and religious fanaticism and extremism, and this is not limited to Jewish extremists but includes members of the Israeli government, he added. There is an explosive situation. There are Netanyahus policies, which are tantamount to pouring oil on fire, said Palestinian chief negotiator Saeb Erekat.