Israeli warplanes bombarded souther Lebanon today after about 50 Israeli troops moved to the outskirts of a village under U.N. control, official news media reported.

The Israeli air raid came after U.S. special Middle East envoy Robert Strauss ended a four-day visit to Egypt and Israel without gaining either country's endorsement of an American proposal for a new U.N. Security Council resolution on Palestinian rights.

The military command in Tel Aviv said Israeli aircraft attacked targets at Ras el-Ain a few miles south of the Lebanese port of Tyre and on the slopes of Mount Hermon about 20 miles north of the Israeli border.

The command said all planes returned safety from the raids on what it said were points of departure for Palestinian guerrilla attacks against Israel.

An Israeli military spokeswoman said she hoped no civilians were hit since "we aimed at terrorists targets."

Reporters who visited Ras el-Ain after the raid said the Israeli bombs destroyed two houses used by Lebanese plantation workers and damaged an orange grove, but caused no casualties other than five persons who were slightly injured when their car ran off a road.

There was no sign that the village had been used as a Palestinian guerrilla base, reporters said.

No details of the raid on the Mount Hermon site were immediately available.

Beirut Radio said the strikes damaged three villages and injured six persons.

Lebanon's official National News Agency said that a few hours before the raids an Israeli mechanized force set up a position near the Lebanese farming community of Shabaa, a mile from the Israeli-occupied Golan Heights. The agency said the Israelis withdrew after they were confronted by soldiers of the U.N. peacekeeping force in Lebanon.

Meanwhile, artillery fire from Israeli-backed right-wing Christian militiamen damaged targets on the outskirts of Tyre, but no casualties were reported.

The Israeli air raid was the first since July 22, when heavy bombardment of the coastal town of Damour killed 18 persons and wounded 65, most of them Lebanese civilians. The United States denounced the bombing, and Secretary of State Cyrus Vance told Congress that Israeli may have violated U.S. law by using American-made weapons for non-defensive purposes.

There were these other Middle East developments:

Israeli Prime Minister Menachem Begin told his Likud Party that he will delay an assessment of future relations with the United States until after Thursday's meeting of the U.N. Security Council, according to party leaders.

Israeli radio reported that a rubber dinghy belonging to Palestinian guerrillas was sunk by an Israeli naval vessel and that three guerrillas were captured.

A car loaded with explosives blew up in the predominantly Christian eastern sector of Beirut, killing seven persons. On the Moslem western side of the city, a bomb damaged a theater showing a controversial film, "The Message," about Islam and the Prophet Mohammed.