The US government is concerned about reports of vote-rigging in Nigeria's presidential election, which the ruling party's candidate won, a White House spokeswoman said Monday, according to dpa. With up to 200 people reported killed in election violence, President George W Bush's administration appealed to Nigerians to settle their differences peacefully. "We are concerned and troubled about the reports of irregularities in the Nigerian elections," spokeswoman Dana Perino told reporters. Nigerian opposition groups have rejected the official result of the presidential poll, which European Union observers said fell short of democratic standards.
