monrovia liberia supreme court monday put presidential run-off hold electoral commission investigate claim irregularities allege fraud last month first round vote former footballer george weah initially set face vice-president joseph boakai tuesday determine replace nobel peace prize laureate ellen johnson sirleaf successful vote would liberia first democratic transfer power 70 years preparations second round halt last week supreme court announce examine complaint liberty party third-placed candidate charles brumskine supreme court order full investigation allegations could push back run-off date weeks even result re-run first round nec national elections commission stop prohibit conduct run election complaint file petitioners investigate nec supreme court rule say address supreme court last week brumskine cite gross irregularities first round accuse nec officials fraud nec deny wrongdoing say election largely fair international observers say saw major problems vote grow chorus party express doubt vote include boakai rule unity party last week accuse johnson sirleaf one members try influence vote reject allegation course pursue charles walker brumskine liberty party great us country brumskine say follow supreme court rule janga kowo secretary general weah cdc party call upon supporters remain calm allow legal process run course unity party immediate comment monday rule expectations poll delay increase tensions liberia many eager change 12 years johnson sirleaf rule tenure cement peace long civil war many liberians say little alleviate widespread poverty despite vast iron ore reserve unclear run-off take place nec mid-november rule liberty party complaint reject brumskine could still take case back supreme court appeal potentially push date second round december court also option call new first round vote hold within 60 days liberian court halt presidential run-off vote amid fraud probe