A killer disease is decimating fish stocks in the Zambezi River Valley, threatening the food security and livelihood of hundreds of thousands of people in an area shared by seven southern African countries, a United Nations agency said Tuesday.

Zambia's opposition leader Michael Sata on Tuesday again rejected ruling party Rupiah Banda's victory in last week's presidential by-election, setting the stage for a protracted political stand-off in

Despite leading in most polls, Zambia's main opposition party Saturday called for a delay in the announcement of presidential election results, citing irregularities in the handling of the results.

Zambia's elections were declared transparent and free by the Southern African Development Community (SADC) as main opposition leader Michael Sata maintained his lead over acting president Rupiah Banda

Zambians went to the polls Thursday to elect a successor to deceased president Levy Mwanawasa in a tense contest between a government veteran promising stability and a charismatic populist.

Over 14 African heads of state, including Zimbabwean President Robert Mugabe, were expected to attend the funeral in Zambia Wednesday of late president Levy Mwanawasa.