A South African man, with eyes darkened by sleepless nights, tells us his older brother was lured into fighting for Russia on the frontline in Ukraine's raging Donbas region.

"To them, it's a suicide mission because they have never been trained for the military. They don't have military training - they don't have military experience," says Bongani, whose name we have changed for his safety.

In the hidden back garden of a modest hotel in KwaZulu-Natal province, he continues: "They don't have experience of any war. They are just bodyguards who want to get a job and provide for their families. That's all."

Bongani says his brother travelled to Russia on a flight via Dubai after being told he would be receiving bodyguard training along with at least 16 other South African men. After signing a contract in Russian, their fate was sealed.

"The problems started when they were moved from Russia to Ukraine, and they asked them: 'Guys - where are we going now because we are here for training?'

"And then the Russians said: 'Training for what? We don't know anything about training - what we know is that you've signed the contract. You are under our command now - under the Russian army.'"

How is this happening?

Sky News has seen harrowing SOS video messages from South African men who describe entrapment and deployment to the frontline in Ukraine.

In one video, a man in military fatigues details the moment they signed their contracts. He claims Duduzile Zuma-Sambudla, the daughter of former South African President Jacob Zuma, encouraged them to sign away their lives.

"We refused to sign the contract forms because it was written in Russia, which we didn't understand. We asked them for a translator - someone who can translate the language. They said there was no network," he says in fluent English.

"That is when Duduzile came with a guy by the name of Khosa. She said we must sign the contract because it is the same thing they did. Duduzile said she is doing the same course we are doing, the same training, and that unfortunately she won't be with us because she is training somewhere else."

"Yes, we agreed. We did sign the forms because we trust the lady, Duduzile."

Duduzile Zuma-Sambudla is accused of trafficking South African men - including eight of her own relatives - for mercenary recruitment by her half-sister Nkosazana Bonganini Zuma-Mncube, who has filed police charges against her.

She denies the allegations and says she was a victim of deception, misrepresentation, and manipulation.

The South African Police Service (SAPS) say they are currently investigating the charges. Duduzile Zuma-Sambudla has resigned as a member of parliament and has not responded to our request for comment.

Five hours away in Johannesburg's Gauteng province, we watched as another case of suspected mercenary recruitment played out in a South African magistrate's court.

Five suspects were ushered out into a crowded courtroom in Kempton Park after being arrested on their way out of Johannesburg's Oliver R Tambo airport following a tip-off to the police that they were allegedly travelling to Russia via the United Arab Emirates.

The line-up is sullen as the three young men on one end of the stand look down at their hands. The youngest is only 21 years old.

At the other end of the stand is a 39-year-old woman called Patricia Mantuala, who stands accused of recruiting them. The five suspects were eventually granted bail by the court after a postponed hearing.

Colonel Katlego Mogale, a spokesperson for the Directorate for Priority Crime Investigation (DPCI), also known as the HAWKS, told Sky News and other journalists in a news conference that they are not ruling out the possibility that more suspects will be arrested.

Amid signs of a growing recruitment drive, the families of those who say they are trapped fighting for Russia in Ukraine are advocating for their loved ones to return home - against all odds.

"You are dealing with people who are well known in South Africa and in South Africa nobody's safe and we may never know what's going to happen next to us," says Bongani.

"What's going to happen to our family?" (Sky News)

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