NETANYA, Israel ? A suicide bomber detonated his explosives Sunday in a fruit and vegetable market in the coastal city of Netanya killing himself and wounding at least 28 people, Israeli officials said.

Six of the injured were in serious condition, said Yeruham Mandola, a spokesman for Israel’s rescue service, Magen David Adom.

There was no immediate claim of responsibility, though Palestinian militants have carried out about 60 suicide bombings in the current Mideast conflict.

The bomber was apparently wearing an army uniform, local police commander Aharon Franko said. Police said the bomber was killed in the blast, but authorities could not confirm Israeli media reports of another fatality.

“It was a powerful explosion,” Yamin Yaakov, an injured worker at the market told Army radio. “I saw lots of things flying in the air and blood.”

The bombing came while security forces were on alert in the area of Netanya in central Israel for several hours after information was received that a suicide bomber was preparing an attack, Israel radio reported.

Netanya, which is close to the West Bank, has been frequently targeted by Palestinian militants. In March, an attack in Netanya killed 29 people at a Passover seder, sparking Israel’s recently concluded five-week offensive in the West Bank aimed at dismantling the militant groups in the Palestinian autonomous zones.

“Anyone who thought that the Palestinian terror campaign against Israelis is over is completely mistaken,” David Baker, an official at Prime Minister Ariel Sharon’s office, said Sunday. “The Palestinian terror campaign continues unabated, as does Israel’s battle against terror.”

The last deadly bombing in Israel was May 7, when a suicide bomber from the militant group Hamas killed 15 Israelis at a pool hall just south of Tel Aviv, in Rishon Letzion.

Israel threatened to launch an offensive in the Gaza Strip similar to the one carried out in the West Bank. However, with the United States and other countries urging restraint, Israel decided not to unleash the offensive, though it warned it might do so at a later date.

Sunday’s bombing came hours after Israeli Foreign Minister Shimon Peres outlined a peace plan Sunday that calls for streamlining the Palestinian security forces immediately followed by the establishment of a state in areas already under Palestinian control.

However, it was not clear how much support, if any, the plan would generate.

Peres, a leading dove, said in a radio interview Sunday that he is trying to get Sharon and the international community to support the proposal.

Sharon has accepted a Palestinian state in principle but says it can only be established after a long interim process that would last years, possibly even a decade or more. His Likud party last week adopted a resolution ruling out a Palestinian state altogether.

The ruling coalition includes Peres’ left-center Labor Party and Sharon’s more rightist Likud.

Peres’ peace plan is partially based on understandings reached in talks he held in the past year with Palestinian parliament speaker Ahmed Qureia. Elements of it were first released to the media Saturday night.

Also Sunday, Jordan’s Prime Minister Ali Abul-Ragheb and Foreign Minister Marwan Muasher met Palestinian leader Yasser Arafat in the West Bank city of Ramallah to discuss the stalled peace process.

“Our visit came as a message to show we are working as one team to achieve our goal of removing the occupation and establishing an independent Palestinian state,” Abul-Ragheb said after the meeting at Arafat’s office.

Abul-Ragheb and Muasher also briefed Arafat on the outcome of talks in Washington earlier this month between Jordan’s King Abdullah II and President Bush.

After a wave of Palestinian suicide bombings in March, followed by the Israeli offensive in the West Bank, the Israeli troops have pulled back to the outskirts of Palestinian cities and towns.

The level of violence had been declining over the past week, though shooting incidents still break out daily.

Palestinian gunmen opened fire Sunday on a convoy of Jewish settlers in the Gaza Strip, the Israeli army said. During an ensuing gun battle, four soldiers were lightly wounded. The Democratic Front for the Liberation of Palestine claimed responsibility for the attack.

The Israeli army said it was investigating at its most senior levels several shootings this weekend in which three Arabs, including an Israeli Arab woman, were mistakenly killed by soldiers.

In a fourth incident, soldiers Saturday shot and wounded a deaf, mentally disturbed Israeli Arab who was wandering in the area of Jewish settlement in the West Bank and failed to hear the soldiers’ calls for him to halt.

The Israeli newspaper Yediot Ahronot reported Sunday that following the shootings some senior army officers expressed concern that soldiers may have a “light trigger finger.” The army said military commanders were reviewing firing orders with soldiers.

Under the plan set out by Peres, the Palestinian Authority’s separate security forces would be centralized into one unified command.

Israel has accused the Palestinian security forces of being involved in violence against Israelis. It has pressed for the multiple, overlapping security services to be reorganized and given clear directions to prevent attacks against Israelis.

Peres’ proposal says a restructuring of the security forces would be followed by a Palestinian state established in areas the Palestinians currently control, a process that could occur within weeks.

Palestinian autonomy zones now cover some two-thirds of the Gaza Strip and islands of territory amounting to about 40 percent of the West Bank.

Peres said he and Qureia, who has been mentioned as a possible successor to Arafat, agreed during their talks that after the establishment of a Palestinian state, the thorniest issues of the conflict – final borders, Jerusalem, Jewish settlements and Palestinian refugees – could be resolved in a year of negotiations.

The agreements would be implemented over a second year.

“I prefer negotiations to shooting,” Peres told Israel Radio. “I realize that these issues cannot be resolved overnight. I also know that the prime minister doesn’t think two years is long enough. But in my eyes it is preferable to immediately begin negotiations rather than to put them off to an unknown date.”