ACCRA, March 16 (Reuters) - The Bank of Ghana said the yield on its weekly 91-day bill remained unchanged at 13.34 percent at an auction on Friday, compared to the last sale on March 9.

DAR ES SALAAM (Reuters) - Five suspended senior executives of Tanzania's national oil company were on Friday charged with corruption offences over alleged irregularities in the award of a survey contract to a U.S. firm.

HONG KONG, March 16 (Reuters) - Hna-Caissa Travel Group , a listed unit of struggling Chinese conglomerate HNA Group, said it plans to buy minority stakes in Hong Kong Express Airways, Ghana's Africa World Airlines and several other companies.

PRETORIA (Reuters) - Former South African president Jacob Zuma was charged with corruption on Friday over a $2.5 billion state arms deal, a stunning judicial ruling on a continent where political 'Big Men' rarely face their day in court.

PRETORIA (Reuters) - Former South African President Jacob Zuma will be prosecuted for corruption relating to a 30 billion rand ($2.5 billion) arms deal in the late 1990s, chief state prosecutor Shaun Abrahams said on Friday.

----------------------------------------------------------- This Diary is filed daily. ** Indicates new events ---------------------------------------------------------- FRIDAY, MARCH 16

ABUJA (Reuters) - The revelation by a Nigerian senator that lawmakers in the upper house of parliament receive about $37,500 each month for personal expenses has prompted anger in the west African country, where most people live on less than $2 a day.

HARARE (Reuters) - Four months after his overthrow, former Zimbabwean president Robert Mugabe was back on familiar territory on Friday, splashed across the front pages after lambasting his successor as a "disgrace".

LUANDA (Reuters) - Angola's ruling MPLA chief former president Jose Eduardo dos Santos told the party's central committee meeting that it should choose a new leader in December this year or April 2019.

LONDON, March 16 (Reuters) - A huge and deadly outbreak of listeria in South Africa could alter the country's approach to food-borne disease and prompt improvements in food safety standards, a leading health official said on Friday.

JOHANNESBURG (Reuters) - South Africa's chief state prosecutor, Shaun Abrahams, will announce on Friday whether he is reinstating corruption charges against former president Jacob Zuma, his office said.

JOHANNESBURG (Reuters) - South African food producer RCL Foods said on Friday its processed meat factory has been cleared of a listeria strain that has killed 180 people since January last year.

ABU DHABI (Reuters) - The United Arab Emirates (UAE) will train Somaliland security forces as part of a deal to establish a military base in the semi-autonomous region, Somaliland's president said on Thursday.

ABUJA (Reuters) - Amnesty International on Friday accused international oil majors Shell and Eni of negligence when addressing spills in Nigeria.

JOHANNESBURG (Reuters) - South Africa demanded on Thursday that Australian Home Affairs Minister Peter Dutton retract comments that suggested white farmers were being persecuted and deserved protection with special visas from a "civilised country".

NAIROBI, March 16 (Reuters) - The following company announcements, scheduled economic indicators, debt and currency market moves and political events may affect African markets on Friday. - - - - - EVENTS: *Mauritius - The central bank auctions 182-day Treasury bills worth 800 million rupees, and 91-day and 364-day Bank of Mauritius bills worth a total 1.8 billion rupees. GLOBAL MARKETS Asian stocks slid on Friday as reports of more chaos in the Trump administration