JOHANNESBURG — British-Zimbabwean national Ndodana Mkhanyisi Tshuma has pleaded guilty to firearm and immigration offences in South Africa, as authorities prepare to extradite him to the United Kingdom over the alleged murders of his wife and two daughters.

Tshuma appeared in the Johannesburg Magistrate’s Court on Tuesday, where he admitted to unlawfully possessing a firearm and ammunition, as well as committing an immigration offence after entering South Africa while allegedly on the run.

The 45-year-old was arrested in Johannesburg in July after an Interpol alert was issued in connection with the deaths of his wife, Nothabo Zandile Tshuma, and their daughters, Natalie, 15, and Nala, 5.

The three were found dead at their home near Bedford in the UK on July 6, with British authorities alleging that they had suffered fatal head injuries. Tshuma is wanted in the UK on three counts of murder.

South African authorities are expected to proceed with his extradition once his local court proceedings have been finalised. The National Prosecuting Authority had previously indicated that the extradition papers were ready.