A Pretoria man who claims that fellow detainees in police cells spent a night raping and assaulting him after he was unlawfully arrested, is suing the minister of police for more than R1 million, Beeld reported.

According to documents handed in at the High Court in Pretoria, the victim was released unconditionally, but later in the same case re-arrested and assaulted in the police cells for a second time, before again being released unconditionally.

According to the victim's lawyer, Robert van Wyk, his client, who lived in Brooklyn and was expected to testify on Monday, was extremely traumatised and humiliated by the attacks.

He reportedly had to undergo three courses of anti-retroviral drugs to combat HIV.

"Fortunately he was HIV-negative," Van Wyk said.

The victim had brought two claims against the minister of police, the first of which, for R940,000, was due to the arrest and detention involving the alleged rape, and the second, for R150,000, was for the second arrest and detention.

The plaintiff was arrested on September 16, 2011 at the Rustenburg Mall on charges of human trafficking and taken to the Rustenburg police cells, where he was detained in a cell along with about 20 other men.

He alleged that they stripped him, sexually assaulted him, raped, and severely beat him until 6am the next morning.

He asked police several times the next day to see to his needs and told them that he had been assaulted and raped, but they reportedly did nothing, and refused to allow him to call his family.

Police had denied all the allegations.