The 35-year-old took to Twitter to send the muggers an angry message, writing:
'To the person who mugged my 67 year old mum and my sister. I hope you get hit by a bus and die. Slowly.’
Her tweet was met by instant concern, with presenter Kate Thornton replying: 'Is your mum okay? So sorry to hear that'.
However Myleene did not divulge any further information, indicating that it may now be a police matter.
The singer is often accompanied to events by her Tv producer sister Jessie, and has spoken of her pride over being raised by a 'strong, honest' Filipino mother.
Unfortunately this is not the first time Myleene has suffered such an incident.
In 2005, the mother-of-two was attacked in Bermondsey, when a group of youngsters attempted to take her picture.
Talking about her place as a guest panelist on Loose Women, she recently said:
‘I'm really excited to be part of a team of strong, feisty, fearless women. I look forward to joining a conversation that usually happens in my kitchen!’