QAMISHLI, Syria, June 2 (AFP) - 23h29 - Syria's official press Thursday named five men whom the authorities have blamed for the murder of a Kurdish Muslim religious leader, but Kurdish groups and the victim's family were sceptical.Sheikh Mohammed Maashuk Khaznawi, who went missing last month, was buried Wednesday in his native Qamishli, northeast Syria, where he used to lead prayers, drawing tens of thousands of mourners, according to Kurdish officials.

"Security forces arrested two members of the gang which carried out the crime of kidnapping and assassinating Sheikh Khaznawi," said the Tishrin government daily.

It named them as Yassin Matar Hindi, 43, a Damascus employee of the state electricity authority, and Mohammed Matar Abdullah, 36, prayer leader of a mosque in Hassakeh, northeast Syria.

The two are both natives of Deir Ezzor in the same region, it said.

Three other members of the gang are on the run, Tishrin said, giving their names as Ismail Kadri Malla, also from Hassakeh; Samir Tlaigeh from Aleppo, north of Damascus, and Said Haidaleh from Deir Ezzor.

On Wednesday, the interior ministry had said all five were arrested.

But Kurdish parties were unconvinced.

"The reports by the Syrian media are dubious; they conceal political motives," Hassan Saleh, secretary general of the banned Kurdish party Yakiti, told reporters in Qamichli.

He called for a commission of inquiry, including Kurdish lawyers, "to uncover the truth", and declared that sit-in protests would be held in Kurdish areas of northeast Syria as well as in Damascus and Aleppo.

"We know the criminals who killed our father. We are going to publish a communique about this," said Mohammed Murad Khaznawi, 30, one of the murdered sheikh's 16 sons.

"If we had been in Switzerland, I would have told you the truth but we are in Syria," he said.

In the town of Qamishli, shops kept their shutters down Thursday in a sign of mourning. Inside a huge tent erected for the family to receive condolences, several mourners also insisted on finding out the truth of the murder.

And late on Thursday several hundred Syrian Kurds demonstrated here, in two separate demonstrations, in protest at the killings and to demand the perpetrators be punished.

Late on Thursday the streets of the town were deserted, with the police out in force.

Despite the official version, Amnesty International said Khaznawi was "at least the sixth Syrian Kurd to have died as a result of torture and ill-treatment since March 2004".

The 46-year-old religious leader "died on 30 May, 20 days after he 'disappeared', apparently detained by Syrian military intelligence at an unknown location", the rights group said.

It called for Syrian authorities to launch "an immediate, independent investigation" into the sheikh's death "in custody".

Just days before his disappearance, Khaznawi is reported to have called in an interview with the Canadian newspaper, the Globe and Mail, for regime change in Damascus.

"Either the regime will change or the regime must go ... I could not have said this five years ago because the Americans weren't in (neighbouring) Iraq five years ago," he said.

His disappearance led some 10,000 Kurds to demonstrate in Qamishli on May 21, demanding that the Syrian authorities release news of the cleric's whereabouts.

Qamishli was the site of riots in March 2004 that began with stadium fighting between Arab and Kurdish football fans and grew into bloody clashes between Kurdish protestors, Syrian security forces and Arab tribesmen.

Kurdish sources reported that 40 people died in the fighting. Syrian authorities said 25 were killed.

Syria is home to some 1.5 million Kurds, around nine percent of the population. They are demanding to have their language, culture and political rights recognised.