Lebanese Moslem militia leaders agreed tonight on new security measures to go into effect tomorrow to halt fighting in West Beirut and end shortages of gasoline and bread there.
The agreement between Nabih Berri, the leader of the Shiite Moslem Amal militia, and Walid Jumblat, head of the Druse Progressive Socialist Party, followed a three-hour meeting here with Vice President Abdel Halim Khaddam of Syria.