We can confirm that officers from Derbyshire Constabulary are making inquiries into allegations of further offences committed by Mick Philpott.
These allegations came to light during the investigation into the fire in May last year in which his children died. He, his wife and their friend were later convicted of the manslaughter of six children.
Investigations are continuing and it would be inappropriate to make any further comment at this time.
More top news
The unexploded bomb was found near the Houses of Parliament and led to disruption in central London overnight.
Southern parts of England and Wales will see sunny skies after a frosty start.
Police said the incident in Melbourne, Australia, was terror related.