Police have cordoned off the area around a house in Denver, Colorado in the US that was the scene of a shooting that left one adult and two children dead.
Details of the shooting remain unknown, but the local NBC TV station KUSA reported that one woman and two children were found dead at the home. One other child was reportedly taken to hospital.
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The operation to recover the unexploded bomb near the Houses of Parliament let to disruption in central London overnight.
Southern parts of England and Wales will see sunny skies after a frosty start.
A police spokesman said the incident in the Bourke Street Mall on Friday was not related to terrorism.