NEW YORK â€"  The Group of Eight world leaders has warned North Korea that it faces more sanctions if it continues to threaten the stability of the region with provocative acts such as its failed long-range rocket launch in April.

The U.S., Canada, France, Germany, Italy, Japan, Russia and Britain issued a declaration on the results of the two-day summit. It includes a statement about the G-8's concerns over North Korea's nuclear program, including its uranium enrichment program.

"We affirm our will to call on the UN Security Council to take action, in response to additional (North Korea) acts, including ballistic missile launches and nuclear tests," the declaration reads.

North Korea's state media didn't immediately respond to the G-8's warning.

The United Nations Security Council imposed sanctions against North Korea after its first nuclear test in 2006 and stepped up sanctions after its second test in 2009, hoping to derail the country's rogue nuclear weapons and ballistic missile programs.

North Korea earlier this month threatened to bolster its nuclear arsenal at any cost.

President Barak Obama said Saturday that world leaders also made progress at Camp David presidential retreat in Maryland on other international issues at the summit, including on Iran and Syria.