JERUSALEM (AFP/REUTERS) - The world has betrayed civilians in the Gaza Strip by failing to end a blockade of the Hamas-run enclave, 16 rights groups, including Amnesty International and Oxfam, said Tuesday. The groups argued that Israel was in violation of international humanitarian law by enforcing a collective punishment with an indiscriminate blockade on Gaza punishing all for the acts of a few. The report, produced by 16 international and western European humanitarian and human rights groups, was released to coincide with the first anniversary of the Israeli offensive. The reports authors urged the European Union to take immediate and concerted action to secure the lifting of the Gaza blockade. The international community has betrayed the people of Gaza by failing to back their words with effective action to secure the ending of the Israeli blockade which is preventing reconstruction and recovery, said the report. The groups said Israel had allowed only 41 truckloads of construction materials into Gaza since a devastating 22-day war launched by the Jewish state nearly a year ago ended with mutual ceasefires on January 18. Little of the extensive damage the offensive caused to homes, civilian infrastructure, public services, farms and businesses has been repaired because of the shortages, the report said. Sick, traumatised and impoverished people are being collectively punished by a cruel, illegal policy imposed by the Israeli authorities, said Kate Allen, director of Amnesty International UK. Israels responsibility to protect its citizens does not give it the right to punish every man, woman and child of Gaza, she added. The report said 90pc of people in Gaza suffer power cuts of four to eight hours a day. Poor water quality was also a major concern for aid agencies, with diarrhoea causing 12 percent of young deaths. Other groups signing the report include: Broederlijk Delen, CAFOD, CCFD Terre Solidaire, Christian Aid, Church of Sweden, Diakonia, Finn Church Aid, Medical Aid for Palestinians, medico international, medico international schweiz, Mercy Corps, MS ActionAid Denmark, Trocaire, and United Civilians for Peace. Meanwhile, Hamas and other groups called on Egypt on Tuesday to stop building a steel wall along the Gaza border that could block tunnels through which goods and weapons are smuggled into the blockaded Palestinian enclave. Hamas sees the continued building of the wall as unjustified and it will bring catastrophe on the Palestinian people, Hamas spokesman Sami Abu Zuhri told a news conference, where the group and other factions urged Cairo to end the project.