Police have been given more time to question two men arrested in Dewsbury on suspicion of terror offences.
The suspects, aged 52 and 21, were held by Counter Terrorism Policing North East on Tuesday on suspicion of being concerned in the commission, preparation or instigation of acts of terror.
Loud bangs were heard in the Savile Town area as officers gained entry to the property.
An address in the West Yorkshire town was still being searched by officers.
A spokeswoman for the unit said: "This morning an extension was approved by the court, giving detectives until April 10 to question the men, aged 52 years and 21 years."
West Yorkshire Police said it will continue to reassure local residents following the raids and will protect the public.