AIRLINES in Nigeria said flights were being disrupted after ground staff began an indefinite strike to demand higher pay. Air Peace, which has the biggest fleet in Nigeria, and smaller carrier Dana Air said the strike by the Nigerian Aviation Handling Company (NAHCO) was delaying flights and hoped the issue would be quickly resolved. "The strike has affected all operations of all airlines being handled by the company (NAHCO)," Air Peace said in a statement. British Airways and Qatar Airways, among the foreign airlines frequently flying to Nigeria, did not immediately respond to requests for comment. The National Union of…