Ms Engels was visiting a hotel room in an upmarket suburb of Johannesburg where the first lady's sons were staying, where she alleges the assault happened.
But Mugabe failed to hand herself over to police as agreed earlier this week and is now claiming diplomatic immunity.
South Africa's police ministry said on Thursday that it is waiting for instruction from the global relations department regarding Grace Mugabe's status before it proceeds.
Her official duties at the summit could bolster her claim to diplomatic immunity, after her trip to see her sons was widely described as private.
Engels said she was attacked with an electrical extension cord. "She beat me with such force and energy that I never thought she was going to stop", she said.
Hong Kong readers may recall the fiery first lady having been similarly accused back in 2009. Police there said the incident was reported but that no charges were brought.
Circumstances for applying for diplomatic immunity could include not being aware that an action was a crime in another country, or if the crime was committed in furtherance of their own country's interests.
When Nel was asked about why Mugabe was not arrested, he revealed "a positive" that Engels was told by her investigative officer on Thursday morning that he intends to get a warrant soon for Mugabe's arrest.
Zimbabwean first lady Grace Mugabe.
It said in a statement: "Discussions with the suspect's lawyers and the Zimbabwean High Commission representatives are taking place to make sure that the suspect is processed through the legal system".
The model told independent media in South Africa that she fears being victimized for telling it all, noting that she now spends most of her time at home.
Mugabe is now seeking diplomatic immunity.
"I can say to you, the matter is receiving our attention and we are liaising with all involved in the matter of the suspect [Grace Mugabe] who was supposed to appear in court but did not".
The company reported ($0.16) earnings per share (EPS) for the quarter, beating the consensus estimate of ($0.29) by $0.13. Still, some analysts seemed concerned that on Instagram, owned by Facebook , users spend a similar amount of time.
If you're skeptical something like this could actually happen, know it's not the first time a lost ring has sprouted up this way. While gardening on the family farm back in 2004, Grams was pulling out a weed when her engagement ring fell off her finger.
Among current Rams receivers, Robert Woods was the most productive guy last season and he only had 613 yards on 51 catches. Watkins's future in Buffalo had already been in question after the Bills declined in May to pick up his fifth-year option.
Our gal Rachel Lindsay ended up choosing Bryan Abasolo , the smooth-talking, bearded wonder from Miami who.no one wanted to win. Things just felt choppy going back and forth between the episode and their reactions. "I do not hold her against her for it".
The pastor's family asked Canadian Prime Minister Justin Trudeau for help in securing Lim's release from the country. Cameron Ahmad says in the statement it is an active case and the government would not be commenting further.
The Republican victor will likely be the next Alabama senator, succeeding Jeff Sessions , who was picked by Trump to be U.S. Strange's second-place finish. 'Well, I hate to make predictions in elections, ' he said, but did so anyway.
Bungie confirmed that third-party applications that are dependent on overlays would not support Destiny 2 on PC. Bungie's upcoming online shooter, Destiny 2 , has hit open beta for PlayStation 4 and Xbox One users.
Gates Makes Massive Microsoft Corporation (MSFT) Donation
The second largest was made by Mr. (Warren) Buffett, who donated nearly $3.2bn to the Bill & Melinda Gates Foundation last month. Gates and his wife set up the charity with an initial $5bn funding pot to improve global healthcare and reduce extreme poverty.
Son of the late singer Natalie Cole passes away at 39
Washington D.C.: Robert Yancy , the son of late R&B singer Natalie Cole , has died at the age of 39 of an apparent heart attack. Family members say that Yancy , who worked in the music industry, had never abused drugs and was "turning his life around".
Scaramucci to Trump: Go mainstream, lose nonsense
Writing on Twitter, she said: "There should be no place in society for racism, white supremacy and neo-nazis". In the call, Scaramucci went after Bannon , using vulgar language to describe the chief strategist.
Two dead in Kenya poll protests
Police also opened fire in the capital, Nairobi , where opposition protesters had blocked roads and set up burning barricades. The protests were inspired by the announcement that incumbent President Uhuru Kenyatta is the victor of the Tuesday election.
Army jawan killed in Pakistan firing on LoC
He said that the injured soldier was shifted to an Army base hospital in Srinagar where his condition is stated to be stable. However, Islamabad rejected the charges and suggested an independent investigation.
War is no solution, India tells China
Hu said the military operation would aim to seize Indian personnel "illegally" lingering in Chinese territory or expel them. The "expert" wrote in the daily that the "Chinese side will inform the Indian foreign ministry before its operation".