Negotiations reached an impasse at the UN climate talks in Bali Friday as the US and the European Union remain divided over setting specific 2020 guidelines for developed nations to cut greenhouse gas emissions. "We continue to insist on including a reference to an indicative emissions reduction range for developed countries for 2020," the EU's Environment Commissioner Stavros Dimas said on the final day of the 12-day conference. As the 6 pm (1000 GMT) deadline passed without an agreement, Indonesia's Environment Minister Rachmat Witoelar said meetings were "ongoing," and that the negotiations would continue Friday evening, according to a report of the German news agency "DPA." "All parties are willing to be flexible to reach a compromise. We are sure that we are able to reach an agreement but also to have ambitious guidelines," German Environment Minister Sigmar Gabriel said. ""The tone at the climate conference has changed into positive. The Americans are now more flexible."