Bosnian Serb leader Radovan Karadzic announced that his side would stop firing on Muslims Friday at noon -- in accord with the ceasefire agreement brokered by former President Jimmy Carter -- but the Serbs seemed to continue unrelenting attacks right up to the deadline. Today, shells slammed into a Sarajevo marketplace, killing two people, and another round killed one more person in the U.N. "safe zone" of Bihac. "It is a bad sign for the cease-fire," Bosnian Vice President Ejup Ganic said of the shelling. "We are very disappointed. Nevertheless, we are pushing for a cease-fire and we hope we get a cease-fire." Bosnian Serbs denied responsibility, accusing the Muslim-led government of attacking its own people to influence public opinion and sabotage peace talks.