New York  - Israel's decision to expel a US expert on human rights was a "dangerous" move that contravened mandates given to rights advocates working for the United Nations, the UN General Assembly president said Monday.

Richard Falk was detained at Jerusalem's airport on Sunday and then deported back to the United States. Falk's mandate given by the 192-nation assembly is to assess the situation in Palestinian- occupied territories.

The Israeli foreign ministry on Monday said Falk was "unwelcome in Israel."

A ministry statement said Falk's visit was uncoordinated and without the state's consent and he was therefore turned around.

Israel has long complained about the mandate Falk took over earlier this year, saying it is biased in favour of the Palestinians and prevents the expert from making any comments about human rights abuses committed against Israelis.

He had also personally infuriated the Jewish State when he compared Israeli actions in the Palestinian territories with those of the Nazis during World War II.

Assembly president Miguel d'Escoto Brockmann, who has criticized Israel in the past, said the Israeli government took a "dangerous decision ... to rebuff UN mandates and UN-appointed mandate holders."

"This again is not conducive to the good climate that the president of the General Assembly is trying to promote," he said in a statement.

Falk, a law professor at New York University, is the UN special rapporteur for human rights in the occupied Palestinian territories. He has criticized Israel's policy against the Palestinians in the territories occupied by Israel since 1967.

Miguel d'Escoto said Falk was investigating "human rights violations that affected the protected civilian population of Gaza, the West Bank and East Jerusalem. Most urgently he intended to investigate the rising humanitarian crisis in Gaza Strip resulting from siege of Gaza's 1.5 million population imposed by the occupying power."

Israel earlier this month had lodged a rare protest against Miguel d'Escoto, who criticized the international community for failing to help Palestinians establish an independent state after 60 years on the occasion of the 60th anniversary of the Universal Declaration of Human Rights.

He denied on Monday stories that accused him of preventing the Israeli ambassador to the UN to address the assembly on the 60th anniversary last week, calling those stories "slander" and a "malicious lie." (dpa)