Israel conducted dozens of airstrikes across Gaza on Sunday and halted humanitarian aid into the enclave after it accused Hamas of killing troops inside Israeli-controlled areas in what is shaping up to be the biggest test yet of the fragile cease-fire. The Israeli military said two soldiers were killed in southern Gaza, where militants targeted troops inside Israeli-controlled areas with an antitank missile and gunfire. Another soldier was severely injured, the military said. Hamas made two other attempts to attack Israeli soldiers on Sunday, the military said...