Anti-terror police are still searching a house in Buckinghamshire in connection with the London bombings, police have confirmed.
Forensic officers are searching through the semi-detached house
Detectives raided a property in Aylesbury on Wednesday night after it was linked to a hire car left at Luton railway station.
A Scotland Yard spokesman said the forensic examination could take "some time to complete".
Police are carrying out a thorough search and no arrests have been made.
No explosive substances are believed to have been recovered.
A spokesman said: "We can confirm that officers from the anti-terrorist branch supported by officers from Thames Valley Police executed a search warrant issued under the Terrorism Act at residential premises in Buckinghamshire."
Resident Nicholas Doe, who lives on Northern Road where the raid took place, said: "There are at least 20 policemen and some vans."
Mr Doe said the neighbourhood was "generally quiet" and was made up mainly of small terraced houses.