The mother of three children who were killed when the car they were travelling in veered off the road and into a lake in Melbourne’s west is being interviewed by the homicide squad in relation to the incident.

Four-year-old twins Anger and Madit Manyang and their one-year-old brother Bol died in the incident at Wyndham Vale in April.

Their five-year-old sister, Awel, survived.

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Akon Guode, who was behind the wheel at the time, told her family she felt “dizzy” in the moments before the car went into Lake Gladman.

One-year-old Bol and twins Anger and Madit Manyang, 4, died in the incident in April.

The mother of seven children had migrated to Australia from South Sudan to escape war after her first husband died.

Victoria Police said a 36-year-old Wyndham Vale woman arrived at the Spencer St police complex at 12:30pm and was being questioned.

A spokesperson confirmed to the ABC the woman was Ms Guode.

They said the investigation was ongoing.