Deadly fighting between Armenian and Azerbaijani forces over the separatist region of Nagorno-Karabakh showed no signs of abating Wednesday despite a U.S.-brokered cease-fire that took force just two days ago and has so far failed to halt the flare-up of a decades-old conflict. Nagorno-Karabakh officials said Azerbaijani forces hit Stepanakert, the region’s capital, and the nearby town of Shushi with the Smerch long-range multiple rocket systems, a devastating Soviet-designed weapon intended to ravage wide areas with explosives and cluster munitions. One civilian was killed in Shushi and two more were wounded, officials said.