Israeli Air Force planes bombed Palestinian targets in southern Lebanon today, the military command announced.

A short communique said the war-planes hit "terrorist bases in south Lebanon," but gave no details. It said all the Israeli planes returned safely to base.

Israel last sent its jets into action against Palestinians in southern Lebanon June 8 when warplanes bombed guerrilla positions north of Metulla on the Israeli-Lebanese border.

Although there have been no recent Palestinian attacks against Israel, the military has said repeatedly that it will strike at guerrilla targets any time it chooses.

These other Middle East developments were reported:

Israel reopened its Lebanese border crossing to United Nations personnel after a two-day closure prompted by a U.N. officer's alleged attempt to smuggle arms to Palestinian guerrillas. On Friday, Lt. Col. Alfred Gom of Nigeria was arrested after machine guns, explosives and ammunition were found in his U.N. vehicle near Jerusalem.

In Cairo, Egyptian President Anwar Sadat accepted the resignation of Prime Minister Mustafa Khalil's government and immediately asked Khalil to name a new Cabinet. The move was a formal one following the recent election landslide of Sadat's party.

More than 1,000 Lebanese troops, backed by armored cars, restored peace to Christian districts of Beirut following three days of fighting between rival rightist militiamen in which about 15 persons were killed.