Wood said four officials monitoring the North's disablement of its Yongbyon nuclear plant were now preparing to leave.
North Korea accused the UN of double standards and declared that it would restart its nuclear activities on Wednesday.
The North also rejected the UN statement, pulled out of six-party denuclearisation talks and expelled weapons inspectors from the UN nuclear watchdog, the International Atomic Energy Agency (IAEA).
Pak Tok Hun, the North Korean ambassador to the UN, told Al Jazeera that the world body is not being fair.
"There are lot of countries that launched their satellite in the last few years including the United States and Japan - which launched satellites more than 100 times - but this was not dealt with by the Security Council," he said.
"Why does the Security Council deal with the issue in the case of my country? This is selectivity, double standards, it's not fair. We cannot accept that, we made it clear."
Park gave warning that Pyongyang would respond by taking the "appropriate strong measures".
The Security Council statement issued on Monday condemned the North's April 5 rocket launch, saying it violated a resolution banning Pyongyang from conducting missile-related activities.
Pyongyang says the launch placed a satellite into orbit, and has defended what it says is its sovereign right to a space programme.
But the US military says no satellite has been detected after the rocket's upper stage and its payload crashed into the Pacific ocean.
It says the launch was a cover for a long-range ballistic missile test.