11.   After the clash Friday, Israeli military aircraft struck Lebanese army positions near the front line and destroyed two armored personnel carriers.

12.   Arafat, with his wife Soha and their daughter Zahwa, flew back to his Gaza Strip headquarters Monday in an Egyptian helicopter escorted by two Israeli aircraft.

13.   Before Israeli aircraft took off for Beirut, Israeli troops bombarded suspected guerrilla bases in southern Lebanon.

14.   But a group spokesman said the Israeli aircraft struck humanitarian and social offices.

15.   But a guerrilla spokesman said the Israeli aircraft struck humanitarian and social offices, and that no fighters were hurt.

16.   But it was not clear whether the Israeli aircraft was ferrying commandos on a mission or merely providing a show of force.

17.   But it has recently begun defending its area of operations and firing anti-aircraft guns at intruding Israeli military aircraft.

18.   But recently, it has been defending its area of operations and firing anti-aircraft guns at intruding Israeli military aircraft.

19.   But the army has recently been defending its area of operations and firing anti-aircraft guns against intruding Israeli military aircraft.

20.   But it was not clear whether the Israeli aircraft were ferrying commandos on a mission or merely providing a show of force.