JERUSALEM (AFP) - Israeli aircraft struck smuggling tunnels on Gaza 's border with Egypt on Monday, after two rockets were fired from the Palestinian territory, witnesses said. Israel says armed groups use the tunnels around the border town of Rafah to smuggle weapons into the Hamas-run Palestinian enclave. Just hours before the airstrike, two rockets were fired into southern Israel from Gaza but exploded without causing any casualties, an Israeli army spokesman said. One of the short-range rockets hit an empty field while the other fell on a farm causing slight damage. The little-known Hezbollah Brigades Palestine said it fired the rockets in honour of Imad Mugnieh, a Hezbollah leader killed one year ago in Damascus in an attack the Lebanese Shia group blamed on Israel. Meanwhile, a Palestinian man was killed in Gaza on Monday when ordnance that he was handling exploded in the north of the Hamas-run territory, medics said. Rajab Sobeh was killed in the blast in the northern town of Al-Atatra, witnesses said. It was not clear whether the ordnance was from the Israeli army or from Palestinian militants, they added. Medics originally said that the man died in Israeli shelling, but the army denied that it had opened fire.