Two Palestinians, a Hamas militant and a farmer, were killed on Tuesday in northern and southern Gaza Strip, local witnesses said.
Witnesses said that an Israeli aircraft struck a group of Hamas militants before dawn on Tuesday, killing at least one Hamas militant and wounded two others in northern Gaza Strip.
Mo'aweya Hassanein, chief of emergency in the Ministry of Health said that Fadi Assaf, 22, was killed in an Israeli airstrike near the town of Beith Hanoun in northern Gaza Strip.
Meanwhile, an Israeli army force stormed into eastern Rafah town in southern Gaza Strip in an operation, which the army said aims at searching for tunnels near the borders with Israel.
Armed clashes erupted between the soldiers and militant groups, said witnesses, adding that in the gunfire a 55-year-old farmer Ali al-Soufi was killed and his body was taken to Rafah Hopsital.
Local residents said the Israeli army force pulled back to the borders after a few-hour operation in the area. Two more civilians were injured and two others were detained.
Hassanein said that five Palestinians were killed since Monday afternoon in the Gaza Strip, four of them are militants and one farmer.
Israeli-Palestinian escalation of violence in Gaza came as more than 40 countries and international organizations are preparing to join on Tuesday a U.s.-host peace conference in Annapolis, Maryland to end the Israeli-Arab conflicts.