GAZA CITY, Gaza Strip (AP) — An Israeli airstrike killed four Palestinian militants as they fired mortars from the Gaza Strip on Sunday, Palestinian officials said, just hours after another group of militants struck Israel in a separate rocket attack. The violence was the latest in a surge of clashes that have rocked a 5-month-old truce between Israel and Gaza’s militant Hamas rulers. Both sides say they would like to preserve the Egyptian-mediated truce, which is due to expire next month, but events over the past two weeks signal the opposite is happening. The militants killed in the airstrike were from a small Hamas-allied group known as the Popular Resistance Committees.—-Contact The Daily Reveille’s news staff at [email protected]