This is the Latest on assault allegations against Zimbabwe’s first lady (all times local):

3:40 p.m.

South African authorities say an Air Zimbabwe flight was not allowed to take off from Johannesburg because it was not in compliance with civil aviation rules.

The South African Civil Aviation Authority says an inspection was conducted Friday evening on the Boeing 767-200 aircraft and it was found not to be in compliance with South African and international guidelines.

The aviation authority says an aircraft must have a “foreign operator’s permit” and other documents in order to fly in and out of South Africa.

The authority says it recently took similar action against other operators, including Turkish Airlines, Qatar Airways and Saudi Airlines.

South African Airways says Zimbabwe cited similar rules in placing restrictions on its operations Saturday, which affected the government-owned airline’s flights between the neighboring countries.

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2:05 p.m.

South African Airways says Zimbabwe has placed restrictions on its operations, affecting its flights between the neighboring countries.

The South African government-owned airline says its flight from Zimbabwe’s capital to Johannesburg was unable to take off as scheduled Saturday morning. Another flight from Johannesburg to Harare has been canceled.

South African Airways says Zimbabwean authorities are demanding a “foreign operators permit” to allow the airline to operate in Zimbabwe. It says it has been flying to and from Zimbabwe for more than 20 years and that the permit was never required until Saturday morning.

The restrictions come as South Africa’s government weighs whether to grant diplomatic immunity to Zimbabwe’s first lady, who is accused of assaulting a young model at a luxury hotel in Johannesburg.

The statement by the airline does not mention the allegations.

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1:40 p.m.

A South African Airways flight bound for Johannesburg has been prevented from leaving Zimbabwe’s capital, Harare.

Civil Aviation Authority of Zimbabwe chief executive David Chawota is not specifying the “issues” requiring attention before the plane is allowed to leave. He says “the South Africans know what should be done.”

The cause of the delay is not clear. It comes as South Africa weighs Zimbabwe’s request for diplomatic immunity for its first lady, who has been accused of assaulting a young model in Johannesburg.

South African Airways says in a statement it is awaiting a decision by Zimbabwean authorities. It says it is treating the matter as “urgent.”

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12: 30 p.m.

Zimbabwe’s first lady is expected to make her first public appearance today since being accused of assaulting a young model at a luxury hotel in South Africa.

Local media are reporting that Grace Mugabe is expected to attend a regional summit Saturday with her husband in South Africa’s capital, Pretoria. President Robert Mugabe is attending the Southern African Development Community’s leaders’ conference.

South African authorities are weighing a request by Zimbabwe’s government for diplomatic immunity for the first lady, who has not commented.

Some demonstrators are protesting in Pretoria against the 93-year-old Mugabe and his wife, saying she should be prosecuted.

South African police have issued a “red alert” at the country’s borders to ensure Grace Mugabe doesn’t leave undetected, and are confident she remains in the country.

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Photo Credit: Zimbabwean President Robert Mugabe attends the Southern African Development Community's leaders' conference in Pretoria, South Africa August 19, 2017. Zimbabwe's first lady is expected to make her first public appearance today since being accused of assaulting a young model at a luxury hotel in South Africa. Themba Hadebe / Associated Press