Members of an advance team of United Nations observers on Sunday toured Homs, Syria, a city that saw some of the heaviest violence as regime forces clashed with a popular opposition. The observers are in the country to maintain a tenuous peace brokered by the U.N. that was supposed to take hold April 12, though fighting has continued. Thirty-two people were killed Saturday, according to the Syrian Observatory for Human Rights. Neeraj Singh, a spokesman for the U.N. mission, told reporters that observers are now permanently stationed in Homs and other hotspots. “I think things have been moving as fast as possible,” Singh said.