A Scotland Yard statement said:
"Police attended an address in Albert Square to execute an arrest warrant at approximately 9am... While officers from Newham attempted to arrest a male suspect, they were attacked by a pit bull-type dog.
"A dog unit was called to the scene and CO19 Specialist Firearms Command also attended. The dog was contained and subsequently shot dead."
More top news
New test could help doctors identify the signs of lung cancer up to five years before the disease shows up on traditional scans.
The Police Federation is pushing for a wider rollout of Tasers , and a new model, the X2, is awaiting Home Office approval.
Charity says social media is helping fuel a nation of 'deeply unhappy' children as figures show rise in number hospitalised over self-harm.