WASHINGTON (AFP) - The US Senate on Wednesday called North Korea a threat to its neighbours and pushed for a formal review to see whether Washington should return the secretive regime to a US terrorism blacklist. By a vote of 66-31, lawmakers urged President Barack Obama to consider new sanctions on Pyongyang and sought a report within 30 days formally assessing whether the Stalinist nation belongs on the state sponsors of terrorism list. US President George W Bushs administration removed North Korea in October 2008 as part of diplomatic efforts to curb Pyongyangs nuclear and missile programmes, angering US conservatives who denounced what they described as an unwarranted concession to a brutal regime. On Wednesday, the Senate voted to defeat tougher language from Republican Senator Sam Brownback that would have urged the Obama administration to return North Korea to the US list of state sponsors of terrorism. Instead, they adopted a measure offered by Democratic US Senators John Kerry, the chairman of the Senate Foreign Relations Committee; Jim Webb, chairman of its panel on East Asian and Pacific Affairs; and Carl Levin, the chairman of the Senate Armed Services Committee. The non-binding measure declares North Korea a threat to the northeast Asian region and to international peace and security, vows strict enforcement of existing international sanctions on the Stalinist regime, and says Washington should consider the imposition of new sanctions. It also calls for the Obama administration to provide a report within 30 days that should present any credible evidence that North Korea has aided acts of terrorism or terrorist groups. It should also examine Pyongyangs proliferation record, and assess the effectiveness of returning it to the blacklist. The measure passed as an amendment to an annual US defence spending bill, which requires passage by the full Senate and House of Representatives before it can go to Obama to be signed into law.