massacred more than 300 civilians
... that on May 14, 1980, Salvadoran forces massacred more than 300 civilians while Honduran soldiers prevented them from escaping across the border?
... that on May 14, 1980, Salvadoran forces <b id="mwAfc"><a href="./Sumpul_River_massacre" id="mwAfg" rel="mw:WikiLink" title="Sumpul River massacre">massacred more than 300 civilians</a></b> while Honduran soldiers prevented them from escaping across the border?