Israeli police clashed Friday with angry Moslem youths who were blocked from joining prayers on Jerusalem's Temple Mount, where police killed at least 19 Palestinians during a riot earlier in the week.

The police action Friday came the morning after Israel's government sponsored a rally that drew tens of thousands of Jews to the adjacent Western Wall to assert control over Judaism's holiest site following the unrest.Also Friday, Prime Minister Yitzhak Shamir said Israel would reject any effort by the United Nations to send a team to investigate Monday's killings.

Shamir said a U.N. investigation would be an infringement on Israel's sovereignty over Jerusalem. Israel captured the Arab sector, which contains the Temple Mount, from Jordan in the 1967 Middle East war and later annexed it.

"In the recent past in the Middle East, there have been a number of incidents where people were killed . . . and we did not see the Security Council being pressured to such grave discussions," he said.

Shamir made the remarks on Israel radio after meeting with a three-man panel, headed by former Mossad intelligence chief Zvi Zamir, who was appointed by the government to investigate the clash.

Also Friday, more than 1 million Palestinians in Arab east Jerusalem, the West Bank and Gaza were confined to their homes by curfews for a fifth day because of Monday's riot on the Mount, which is holy to both Moslems and Jews.

In the occupied Gaza Strip, only three mosques were allowed to open for prayers Friday, residents said.

Army roadblocks stopped Palestinians from the occupied West Bank from approaching Jerusalem. In the city, police blocked hundreds of young men from walking to prayers, halting them at the gates to the Old City or to the Mount.

Police turned water cannons on one group of 200 Palestinian youths who tried to march to the Mount.