Two Palestinians were killed in Israel's first deadly air strike in a Gaza Strip border area it recently put off limits, just as a truce that has drastically reduced violence formally ended. Israel said its air force hit Palestinian fighters who were about to launch a rocket at Israel late Saturday night. Israel declared the northern Gaza-Israel border a "no-go" zone last week to stop the fighters from firing rockets there at Israel, and warned that Palestinians entering the area could be shot, according to a report of the Associated Press.