BAGHDAD, Iraq (CNN) -- Two of the last three visiting U.N. inspection teams left Baghdad on Monday, ending their current series of searches for Iraq's illegal weapons, a U.N. official said.

The final team will leave later Monday, said Caroline Cross, spokeswoman for the United Nations Special Commission.

Up to 140 resident experts, however, will remain in the country to continue to monitor Iraq's weapons programs.

The latest inspections were the final test of Iraq's compliance with UNSCOM before chief weapons inspector Richard Butler reports to the U.N. Security Council this week on whether Baghdad has fully cooperated in the search for banned weapons.

The United States and Britain called off threatened air strikes after Iraq pledged to resume cooperation with UNSCOM on November 14. Washington and London maintain that military strikes remain an option to compel Baghdad to submit to the inspections.

The Security Council must decide that Iraq is fully cooperating with inspectors before it will undertake a comprehensive review of Iraq's compliance with U.N. resolutions.

Iraq hopes the review will convince the U.N. to ease or lift sweeping economic sanctions imposed after its 1990 invasion of Kuwait.

Before the Security Council can lift the sanctions, UNSCOM and the International Atomic Energy Agency must certify that Baghdad has eliminated al research and production for biological, chemical and long-range missile weapons.

Iraq's Foreign Minister Mohammed Saeed al-Sahaf said on Monday that weapons inspectors should declare that it had met all its obligations, but Iraq had limited expectations of the report.

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"We will wait and see. We are not pinning our hopes on it," Sahaf said.

"We want objectivity which acknowledges that we have implemented all our obligations...and that the time came long ago for sanctions to be lifted," he said.

UNSCOM, which suspects that Iraq has concealed elements of prohibited weapons programs, has cited a number of recent incidents that cast doubt on its commitment to cooperate.

Butler reported a number of incidents, the most serious of which concerned an attempted inspection of ruling Baath Party offices last week.

An Iraqi official let only four inspectors in and UNSCOM withdrew its team, saying a "credible, effective inspection" would be impossible.

Butler said Iraq had attempted to impose conditions on other UNSCOM teams. In one case Iraqi officials tried to stop inspectors photocopying documents and filming an inspection, he said.

The Associated Press and Reuters contributed to this report.