GAZA CITY, Palestinian Territories: Israeli jets launched air strikes on Gaza overnight Thursday to Friday after militants in the Palestinian territory again set off incendiary balloons into southern Israel, the army and AFP journalists said. The fire balloons and air strikes are the latest violence heaping pressure on a fragile cease-fire between Israel and Gaza’s Hamas rulers that came into place on May 21, ending 11 days of heavy fighting. “Over the past day, arson balloons were launched from the Gaza Strip into Israeli territory,” Israel’s military said in a statement. “In response... fighter jets struck military compounds and a rocket launch site belonging to the Hamas terror organization.” AFP journalists in the Palestinian enclave also reported hearing explosions, which the army said hit sites in both Gaza City and in Khan Yunis, in the south of Gaza, home to some two million people. Soon after the strikes, Hamas militants opened fire with heavy machines guns toward the Jewish state, as Israeli warning air raid sirens rang out. US Secretary of State Blinken spoke on Thursday with Israeli Foreign Minister Yair Lapid and discussed “the need to improve Israeli-Palestinian relations in practical ways,” the State Department said in a statement. “They also shared opinions on opportunities to deepen normalization efforts as well as on regional security issues, including Iran,” the State Department said. Palestinian militants in Gaza launched balloons for a third day running on Thursday, according to Israeli firefighters battling the blazes sparked by the devices. The balloons are basic devices intended to set fire to farmland and bush surrounding Gaza.