Police are investigating a report of an attack on the Luton home of a prominent member of the English Defence League (EDL).
Kevin Carroll complained to police on Thursday night after objects were thrown at the windows of his house.
He told officers from Bedfordshire Police that when he went outside to find out what was happening, he saw a man carrying what appeared to be a shotgun.
Officers searched the area, but were unable to locate the man.
Early reports on social networking sites suggested Mr Carroll was shot at, but the police said no gunshots were fired.
The far-right EDL, which describes itself as a human rights group opposed to the rise of what it terms 'radical Islam', was founded in Luton and is planning to stage a large-scale demonstration in the town on February 5th.
A number of previous EDL events have ended in violence, with a minority of its supporters clashing with the police and protesters from Unite Against Fascism.
Some posters on the EDL's Facebook page suggested the alleged attack on Mr Carroll's house may have been an attempt to disrupt the Luton demonstration.
However, the group's founder Tommy Robinson, who also uses the name Stephen Lennon, insisted the plans would not be changed.
'They won't stop us, we will continue. We will defend ourselves. Luton demo would still go ahead... even if one of us was killed! As always, no surrender, not now not ever,' he said.