Israeli military forces have killed seven Palestinians in the Gaza Strip, and an Israeli officer is also dead, after what appears to be a botched undercover raid. The operation took place Sunday night in southeast Gaza, the first-known ground incursion there by Israeli forces since the last war in 2014. The raid and retaliatory firefight have threatened to destroy the unofficial ceasefire in the area—more than a dozen rockets were launched from the Hamas-controlled enclave overnight. Israeli Prime Minister Benjamin Netanyahu cut short a visit to Paris, where he had joined world leaders for the World War I commemoration. Israeli media reported the operation had been launched to gather intelligence and public radio station Kan reported the Israelis had their cover blown as a result of a technical malfunction. Six of the Palestinians killed reportedly belonged to Hamas and the seventh was a member of the militant Popular Resistance Committees.