JERUSALEM, JAN. 8 -- Another Palestinian was shot dead today and five others were wounded in clashes with Israeli soldiers in the Gaza Strip as Israel sought to crack down on a new outbreak of the rioting that has wracked the occupied territories for five straight weeks.

The Army announced it has placed several dozen activists -- one military source put the number at around 40 -- in administrative detention over the past three days, a measure that allows them to be held without charge or trial for up to six months. It is the largest number of activists ever detained in one roundup, and it follows a government decision earlier this week to expel nine other activists.

Defense Minister Yitzhak Rabin warned Hanna Siniora, a prominent Palestinian newspaper editor in Arab East Jerusalem, that he was "playing with fire" and could face arrest for promoting an Arab boycott of Israeli products and measures to slow down tax payments.

While sporadic incidents continue in the occupied West Bank, most of the violence is now concentrated in the Gaza Strip, where youths in teeming refugee camps, many spurred on by Islamic fundamentalists, appear determined to keep the flames burning. Since the expulsions were announced Sunday, the youths have burned tires, set up roadblocks and confronted soldiers with stones and bottles.

"I don't think they are afraid of anything anymore," said an Army official describing the waves of rioters who confronted soldiers today at the Bureij refugee camp in central Gaza. "We tried everything before we opened fire. It looks like they were on a suicide mission."

{In a surprise statement to three visiting U.S. senators, Prime Minister Yitzhak Shamir was quoted as saying that Israel will propose "negotiations and the idea of full autonomy in the West Bank and Gaza Strip" once Israel restores order there, United Press International reported.

{Sen. Alfonse M. D'Amato (R-N.Y.) quoted Shamir as saying Israel would propose the autonomy talks under the framework of the 1978 Camp David accords. Shamir reportedly gave no further details. Shamir's office later issued a statement confirming his remarks.

{"Maybe the (Palestinian) disturbances will provide the impetus to move this (autonomy) process forward," D'Amato told reporters in Jerusalem.}

Last night the Army said a mob of about 1,000 persons attacked soldiers at the Mughazi and Nuseirat camps in central Gaza after loudspeakers in several mosques issued calls for a "holy war against the Jews."

The soldiers opened fire, and a 15-year-old youth was killed and seven others were wounded, according to U.N. officials who said the youth's body was brought to the U.N. clinic at Mughazi. Two of the injured were said to be in serious condition, and there was an unconfirmed report that one of them died today.

A military spokesman confirmed that the clash took place and that a body was found at the clinic, but said Army investigators were still trying to determine how the youth had died.

Today the Gazans attacked again, this time at Bureij, which is just across the main highway from Nuseirat. An Army spokesman said hundreds of residents poured out of several mosques after prayers at about 5 p.m., surrounded an Army unit and pelted soldiers with stones. The Army responded with tear gas and rubber bullets and, when those measures failed, opened fire at the legs of the protesters, killing one person and wounding five others, the spokesman said.

An official of the U.N. Relief and Works Agency, which operates the camp, identified the victim as 22-year-old Khaled Awdeh. She said demonstrators had refused to turn the body over to Army officials and held a funeral procession tonight.

The U.N. official said residents had attacked the Army after reports spread that soldiers had gone from house to house today searching for alleged ringleaders.

Awdeh was the 26th Palestinian shot dead by the Army in the past five weeks. Of those killed, 17 were from Gaza. Nearly 200 more Palestinians have been wounded in the current violence, considered the most widespread and intense wave of disorder since the occupation began 20 years ago.

At least three Gazans have died this week, and soldiers have opened fire in four separate incidents. There was also scattered unrest in the West Bank today, but with the exception of a single incident last Sunday that the Army branded a "mistake," no soldier has fired live ammunition in that region for more than two weeks.

Army officials say social conditions and religious zealotry have helped keep tensions high in Gaza. "People have less to lose and they are more religious," said a spokesman. "They seem to be willing to die, while in the West Bank people don't want to die."

The Army has tried a number of different tactics in recent days, including use of helicopters and spotter planes, larger troop deployments and more riot gear. Today witnesses said they could see hundreds of soldiers deployed near mosques during noon prayers.

The witnesses said they saw the Army use what appeared to be a new type of gas that is released from large buckets and causes nausea, suffocation and skin burns. An Army spokesman said she could not confirm the reports.

Palestinian political moderates like Siniora have tried with little success to assert some influence over the crowds of youths who have been battling soldiers on the streets this past month. Earlier this week, Siniora announced the launching of a civil disobedience campaign designed, he said, to channel Palestinian anger into a more effective and less destructive outlet.

The move has drawn little support in the Palestinian community, and Siniora was forced to scale it down, choosing to begin with a boycott of Israeli cigarettes.

But Defense Minister Rabin told a meeting of businessmen in Tel Aviv that he could prove that Siniora was a "PLO agent" and that the boycott amounted to "a call for rebellion" under the present, volatile circumstances. He confirmed that military officials under his orders had warned Palestinian leaders that such a campaign would be "an illegal activity."

Minister of Police Haim Bar-Lev said police had begun a criminal investigation of Siniora for incitement.

U.N. Undersecretary General Marrak Goulding arrived in Israel today on a mission to investigate the violence. Prime Minister Shamir reiterated his denunciation of U.N. Security Council resolutions criticizing Israel's actions in the territories and said he would not meet with Goulding.

In contrast, Foreign Minister Shimon Peres, Shamir's chief political rival in Israel's deeply divided coalition government, said he would meet with the U.N. official to explain Israel's position.