A hitman accused of pulling the trigger in the murder of newlywed Anni Dewani during her South African honeymoon has been convicted of murder.

Prosecutors believe Xolile Mngeni was hired by Mrs Dewani's British husband, Shrien, to carry out the killing in an attack designed to resemble a car hijacking in Cape Town's impoverished Gugulethu township.

Mngeni, 25, was found guilty of premeditated murder today after a judge at the Western Cape High Court heard an "avalanche of evidence" against him.

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Anni Dewani pictured with Shrien, who continues to deny involvement in her murder

He was further convicted of robbery with aggravating circumstances and illegal possession of a firearm and ammunition.

"The State has proven its case beyond reasonable doubt," Judge Robert Henney told the court.

"The case against the accused is overwhelming and the accused could barely avoid the avalanche of evidence from crashing down on him."

Mngeni was acquitted of Mrs Dewani's kidnapping - deemed to have been part of a single chain of events leading to her murder.

He stood expressionless as the judgment was delivered while his family watched, wide-eyed, from the gallery above.

Businessman Mr Dewani, who has been held at Fromeside Clinic, a secure mental health hospital in Bristol, is fighting extradition to South Africa.

He continues to deny orchestrating the killing on November 13 2010.