Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. UN Urges Cease-fire as Syria Talks Start by Luis Ramirez U.N. envoy Staffan de Mistura is meeting Tuesday in Geneva with representatives of the Syrian government after declaring the start of indirect peace talks and calling on world powers to live up to their pledge to secure an accompanying cease-fire. The process is part of the slow, but incremental track of achieving indirect exchanges between the two sides, a permanent halt to the fighting and a goal months down the road of a political transition with new elections. For now De Mistura will meet with the government before going back to speak with opposition delegates. He issued a challenge Monday to the International Syria Support Group that includes the United States, Russia, Iran, Saudi Arabia, Turkey and others, reminding them that they said their efforts to ensure there was a cease-fire discussion would coincide with the start of negotiations. Five-year conflict Members of the support group have influence on opposite sides, with some allied to Syrian President Bashar al-Assad and others supporting rebels who have spent nearly five years fighting to push him from power. Russia has played a direct role with a campaign of airstrikes backing Assad's forces. Western governments say those strikes have targeted rebels, which Russia denies. ''Syrian and Russian forces launched a new offensive Monday north of the city of Aleppo. The opposition says the government airstrikes are killing civilians and they renewed their threats to leave the talks if the Syrian government does not take steps to show good will. "You cannot ask the Syrian opposition to engage in any negotiation with the regime under this escalation," Farah Atassi, a member of the opposition, said in Geneva. A spokesman for the main opposition group said earlier Monday he had received a "positive response" from de Mistura on opposition demands to halt airstrikes and allow the flow of humanitarian aid to rebel-held areas. An opposition representative described Monday's talks as positive as well. Difficult start U.S. Senator Bob Corker, chairman of the Senate Committee on Foreign Relations, discussed the Syria talks with VOA on Monday, saying he thinks they are starting off in a difficult place. "I think the opposition that, you know, we communicated some with last week has been put in a very awkward place. The humanitarian things that they had asked for have not occurred," Corker said. "I certainly support diplomatic talks as I think everyone would, but the elements at present do not feel that they are in a proper place," he added. Chris Hannas contributed to this report from Washington. WATCH: Related video, U.S. Senator Bob Corker speaks to VOA '' __________________________________________________________________ [1]http://www.voanews.com/content/un-urges-cease-fire-as-syria-talks-st art/3172853.html References 1. http://www.voanews.com/content/un-urges-cease-fire-as-syria-talks-start/3172853.html