JOHANNESBURG, Dec 6 (Reuters) - New global standards for mining waste dams should take into account the difficulties of making existing dams compliant, the chair of an independent panel of experts crafting the new rules said on Friday.

JOHANNESBURG (Reuters) - South African agricultural lobby group, Agri SA, said on Friday its president would resign at the end of the month for health-related reasons, a day after the country moved a step closer to allowing land expropriation without payment.

ABUJA (Reuters) - A Nigerian activist and former presidential candidate whose detention has prompted protests by rights groups was re-arrested on Friday at a court hearing hours after he was freed on bail, his lawyer told Reuters.

LAGOS (Reuters) - Lawyers for the Nigerian government on Friday filed "new and substantive" allegations of fraud with a British court in its ongoing fight against an arbitration award now worth more than $9 billion, a spokesman for the attorney general said.

NAIROBI (Reuters) - At least three people were killed and 27 injured on Friday when a residential building collapsed in the Kenyan capital Nairobi, police said, as rescue workers struggled to free a woman who was screaming from under the rubble.

ATHENS (Reuters) - Greece said on Friday it was expelling the Libyan ambassador, angered at an accord between Libya and Turkey signed on Nov. 27 that maps out a sea boundary between the two countries close to the Greek island of Crete.

VICTORIA FALLS, Zambia (Reuters) - For decades Victoria Falls, where southern Africa's Zambezi river cascade down 100 metres into a gash in the earth, have drawn millions of holidaymakers to Zimbabwe and Zambia for their stunning views.

TUNIS (Reuters) - Two major parties in Tunisia said on Friday they would not join the government of prime minister-designate Habib Jemli, meaning any coalition he does build may be fragile and increasing the risk of a political crisis.

JOHANNESBURG (Reuters) - Uber launched in Ivory Coast's commercial capital Abidjan on Thursday, part of its expansion into African markets with low levels of car ownership and limited mass transport.

LAGOS (Reuters) - A Nigerian activist and former presidential candidate whose continued detention prompted protests by rights groups was released on bail late on Thursday, the news organisation that he founded said on Twitter.

OSLO/ADDIS ABABA (Reuters) - Ethiopian Prime Minister Abiy Ahmed will not talk to the news media when he is in Oslo next week to receive the Nobel Peace Prize, drawing rare criticism from the award committee, which says a free and independent press is vital.

NAIROBI (Reuters) - Kenya's public prosecutor on Friday ordered the arrest of the Nairobi County governor on suspicion of economic crimes, in one of the most high profile arrests since the government launched an anti-corruption push last year.