UNITED NATIONS (AP) — The U.N. is launching a trust fund to cover the cost of relocating a group of Iranian dissidents displaced in Iraq.

Secretary-General Ban Ki-moon says it is "essential to pick up the pace of the relocation" after a Sept. 1 shooting killed 52 members of the Mujahedeen-e-Khalq at their longtime home in Camp Ashraf.

Ban urged countries Wednesday to donate to the fund. He said "generous offers" from some countries have allowed 240 of the 3,174 exiles to settle outside Iraq.

Members of the MEK, which opposes to Iran's regime, were welcomed into Iraq by Saddam Hussein in the 1980s but Iraq's current Shiite-led government wants them out.

The dissidents accuse Iraqi security forces of carrying out the Sept. 1 killings, but Baghdad denies involvement.