The mother and daughter, 9, suffered from deep bite wounds after the dog ran over without a lead.
Police arrived at 5.44pm on Easter Sunday to find the son, 10, had also been bitten on the arm. The children’s dad was also in the park but was left unharmed.
London Ambulance Service treated the mum and two kids before they were taken to hospital. Officers from the Metropolitan Police are looking to speak to three men who allegedly ran towards Vicarage Road, near Hampton Wick Station.
The person thought to own the dog is described as a light-skinned black male with a moustache and hair on his chin. He wore a yellow and black top with black trousers.
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Anyone with information is encouraged to get in touch with police.
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