LONDON (AFP) - A comprehensive arms embargo must be placed on Israel, Hamas and other armed Palestinian groups in the aftermath of the recent conflict in Gaza and southern Israel, Amnesty International said Monday. The London-based human rights group said it had found evidence that Israel and Hamas had both used weapons supplied from overseas to carry out attacks on civilians, accusing both sides of committing war crimes during the three-week conflict at the start of the year. It called for the UN Security Council to impose an arms embargo until mechanisms were put in place to ensure that military equipment was not used to commit violations of international law. "Israeli forces used white phosphorus and other weapons supplied by the USA to carry out serious violations of international humanitarian law, including war crimes," said Donatella Rovera, who headed an Amnesty fact-finding mission to southern Israel and Gaza. "Their attacks resulted in the death of hundreds of children and other civilians and massive destruction of homes and infrastructure." Rovera added: "At the same time, Hamas and other Palestinian armed groups fired hundreds of rockets that had been smuggled in or made of components from abroad at civilian areas in Israel. "Though far less lethal than the weaponry used by Israel, such rocket firing also constitutes a war crime and caused several civilian deaths." Amnesty said it had found fragments and components of artillery, tank shells, mortar fins and airborne missiles and bombs in school playgrounds, hospitals and homes in Gaza. In southern Israel, meanwhile, it found remains of rockets fired indiscriminately at civilian areas by Hamas and other armed Palestinian groups. "We urge the UN Security Council to impose an immediate and comprehensive arms embargo on Israel, Hamas and other Palestinian armed groups until effective mechanisms are found to ensure that munitions and other military equipment are not used to commit serious violations of international law," said Malcolm Smart, Amnesty's Middle East director. Meanwhile, the Israeli army carried out an air raid in the central Gaza Strip on Monday after a military patrol came under fire from the Gaza fighters, witnesses said. There were no reports of casualties from the raid on the Maghazi refugee camp, which was launched after an Israeli army patrol came under fire along the border of the Hamas-run territory. An army spokesman said that the incident was sparked when "two armed gunmen were identified planting an explosive device near the security fence." "And IDF (Israeli Defence Forces) arrived at the scene on the Israeli side of the fence, the Palestinians opened fire at the force and the force pursued the gunmen inside the Gaza Strip. "In addition all states should suspend all transfers of military equipment, assistance and munitions to Israel, Hamas and other Palestinian armed groups until there is no longer a substantial risk of human rights violations. "There must be no return to business as usual, with the predictably devastating consequences for civilians in Gaza and Israel." Both Israel and Hamas ruling Gaza called unilateral ceasefires on January 18 after a massive 22-day Israeli offensive on the territory that killed 1,300 Palestinians and 13 Israelis. Meanwhile, the Israeli army carried out an air raid in the central Gaza Strip on Monday after a military patrol came under fire from the Gaza fighters, witnesses said. There were no reports of casualties from the raid on the Maghazi refugee camp, which was launched after an Israeli army patrol came under fire along the border of the Hamas-run territory. An army spokesman said that the incident was sparked when "two armed gunmen were identified planting an explosive device near the security fence." "And IDF (Israeli Defence Forces) arrived at the scene on the Israeli side of the fence, the Palestinians opened fire at the force and the force pursued the gunmen inside the Gaza Strip.