Who should be responsible for the blast on the beach in Gaza last Friday?

Israel has denied responsibility for the explosion which killed seven Palestinians on the beach in Gaza last Friday.After the explosion, the armed wing of Hamas abandoned the six-month long ceasefire, leading to a spiral of attacks and counterattacks. From Jerusalem, N.C.reports. "The Israeli Defense Minister, the Chief of Staff and the General who conducted the enquiry all lined up at the news conference to insist the activities of the Israeli defense forces last Friday were not responsible for the incident on the beach. The en quiry, they said, had countered for all Israeli weapons used on that day. It looked at the timing of the incident as the Israeli military assessed it, and the pieces of shrapnel recovered from one of the survivor by Israelis have no connection with any Israeli weapon being used, the general said. But the Israeli military also said it wasn’t sure what did cause the blast. The Palestinians and some human rights experts are already rejecting these findings which were released to the Israeli media."