The Big Lottery Fund is urgently reviewing its existing safeguards following an investigation into allegedly fraudulent lottery payments of more than £1m across the charitable sector.
The Charity Commission has frozen around 30 bank accounts belonging to separate charities in England and Wales to protect the funds during the inquiry.
As well as the Community Fund - one of the former grant awarding bodies of the National Lottery - it is believed that BBC Children in Need, Barnardo's, the Bridge House Trust and Comic Relief were also approached.
Eight people have been arrested and bailed until the New Year.
A spokeswoman for the fund said: "Since this came to light we have added further safeguards. We will use the information we gain from the investigation to further develop our safeguards if appropriate."