The alleged killer of a heavily pregnant woman and her baby son has appeared in court. Aaron McKenzie, 25, is accused of murdering Kelly Mary Fauvrelle, 26, who was eight months pregnant. She was stabbed to death in her house in Thornton Heath, south London, on 29 June.

He is also accused of the manslaughter of her baby son, who was delivered at the scene by paramedics. The baby, named Riley, died in hospital four days later.

McKenzie, from Peckham, south London, was arrested on Thursday. He appeared on Monday at Camberwell magistrates’ court where he is also charged with possession of a knife.

He stood in the dock wearing dark blue jeans and a grey sweater, with his arms folded during the brief hearing. McKenzie, of Peckham Park Road, confirmed his name, date of birth and that he is British, but did not give his address.

He was not asked to enter pleas to any of the charges. The district judge, Karim Ezzat, told him he will next appear at the Old Bailey in London on Wednesday for a bail hearing prior to another hearing at Camberwell magistrates’ court on 12 August.

McKenzie was remanded in custody.

Fauvrelle, a Royal Mail worker, was attacked in her bedroom on the ground floor of the family home. Her family, including her mother, two brothers, sister and her sister’s baby son, were all in the house.

They were alerted by the sound of Fauvrelle’s screams at about 3.30am.