NIGERIAN presidential contender Peter Obi of the opposition Labour Party said his supporters were attacked and injured ahead of a rally in the commercial capital Lagos, a stronghold of the ruling party. Previous elections in Africa's most populous nation have been fraught with violence between supporters of rival parties and a number of instances of political violence have occurred ahead of the February 25 parliamentary and presidential vote. "We cannot continue to tolerate attacks on members of the political opposition, often fuelled by the incendiary rhetoric of political leaders," Obi said in a statement, urging police to investigate. It was not immediately…