GENEVA, March 21 (Reuters) - Israel's expansion of Jewish settlements in east Jerusalem and eviction of Palestinians from their homes there is a form of ethnic cleansing, a United Nations investigator said on Monday.

US academic Richard Falk was speaking to the UN Human Rights Council as it prepared to pass resolutions condemning Israeli behavior on territory it has occupied since 1967.

The continued pattern of settlement expansion in East Jerusalem combined with the forcible eviction of long-residing Palestinians are creating an intolerable situation in the part of the city previously controlled by Jordan, he said.

This situation can only be described in its cumulative impact as a form of ethnic cleansing, Falk declared.

Israel declines to deal with Falk or even allow him into the country, accusing him of bias against the Jewish state.

In a linked discussion on Israeli policies towards lands it seized in the 1967 Middle East War, Israeli and Palestinian delegates clashed over the recent killing of members of a Jewish settler family on the West Bank.

Israel's ambassador Aharon Leshno Yaar called on Palestinian leaders to condemn the March 11 murders of three children, including a baby, and their parents without caveats or hedging in Arabic to their own people.

Almost as shocking as the killings, in the days following the massacre many Palestinians took to the streets celebrating the deaths of this family, Leshno Yaar said.

But Palestinian envoy Ibrahim Kraishi said the killings had already been condemned by the Palestinian Authority as an act of terrorism that was not part of his people's culture. Rather, it is the culture of the occupying power, he added.

In his speech, Falk said he would like the Human Rights Council to ask the International Court of Justice to look at Israeli behavior in the occupied territories.

This should focus on whether the prolonged occupation of the West Bank and East Jerusalem had elements of colonialism, apartheid and ethnic cleansing inconsistent with international humanitarian law, the investigator declared.