Swiss lab wants guarantee in Arafat death inquiry

* Lab wants assurances work will be used for political ends

* TV documentary said traces of polonium isotope found on

clothes

* Unexplained death came at time of Israeli siege

RAMALLAH, West Bank, Aug 8 (Reuters) - A Swiss laboratory

will help investigate the unexplained 2004 death of Palestinian

leader Yasser Arafat only if it receives guarantees its findings

will not be used for political purposes, a spokesman for the lab

said on Wednesday.

A committee looking into the Palestinian president's death

has asked the Swiss Radiophysics Institute, which found traces

of a deadly polonium isotope on Arafat's clothing provided by

his widow for a recent Al Jazeera television documentary, to

examine his remains.

"We have been invited by the Palestinian National Authority

and we are currently studying the most appropriate way of

responding to this request," Darcy Christen, spokesman for the

institute, said in an emailed reply to a Reuters question.

"Meanwhile, our main concern is to guarantee the

independence, the credibility and the transparency of any

involvement that we may have," Christen said.

Arafat was a guerilla-turned-statesman who came to symbolise

the Palestinian quest for statehood throughout decades of war

and peace with Israel.

After being stricken with an ailment which remains unknown,

the president was airlifted to France in 2004 when he fell ill

during an extended siege Israel mounted on his compound during a

Palestinian uprising. He died shortly thereafter.

His death aroused rumors among Palestinians of an

assassination, which many blamed on Israel. An investigation

into the case could rekindle Palestinian hostility toward Israel

and widespread suspicions that a local collaborator may have

poisoned him under directions from the Jewish state.

Tawfiq Tirawi, head of the committee looking into the death,

told reporters the Swiss institute was seeking assurances before

sending experts to the Palestinians' administrative capital in

Ramallah, but did not disclose the nature of those guarantees.

"The content of our correspondence pertained to the

necessity of their arrival and our welcoming of their presence

in Palestine as quickly as possible, but they have some legal

issues and legal procedures," Tirawi said.

Exhuming Arafat's body from its limestone mausoleum in the

centre of the Palestinian Authority's presidential compound in

Ramallah would be a deeply emotional move for Palestinians, but

one for which the local investigative committee says the

government and his family are prepared.

"We've asked for (the Swiss team's) arrival at full

speed...the leadership has resolved to grant them any

investigations they might request," Tirawi said.

After the Arafat documentary was aired, his widow Suha

petitioned a French court to open a murder probe, claiming the

circumstances of his death had been mysterious and French

forensic authorities had disposed of samples taken from his body

with undue haste.

Palestinian officials have called for an international

investigation into the case, along the lines of the United

Nations Special Tribunal for slain Lebanese Prime Minister Rafik

al-Hariri, and the Arab League has formed a special committee to

advocate for a United Nations inquiry.

(Additional reporting by Tom Miles in Geneva and Ali Sawafta in

Ramallah; Editing by Michael Roddy)