Windsor Castle and the surrounding area are being combed by "specialist police" ahead of US President Donald Trump’s State Visit next week.
Officers from specialist units were seen examining street furniture and bins near Windsor Castle on Friday, accompanied by detection dogs.
The US leader and First Lady Melania Trump will be welcomed by King Charles, Queen Camilla, Prince William and Princess Kate for a two-day visit, including several engagements and an overnight stay at Windsor Castle.
As such, enhanced security measures have been put in place with Thames Valley Police confirming that the area would see further search operations by officers.
'Specialist police' have been combing Windsor ahead of President Donald Trump's State Visit next week
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Sergeant Amber Timmis, who serves as a police search adviser, spoke to reporters about the operation on Friday.
"Being in Thames Valley Police, we've got lots of people that live here of a royal variety, so just making sure that everyone is safe is something we do quite often, so we're very used to it, very adept in that, and very experienced," she said.
Sergeant Timmis was also questioned about whether recent American security incidents had affected their approach.
"We do what we do, we already have a clear strategy and a clear message from our side of things," she said.
Teams of police, accompanied by sniffer dogs, have been searching the area high and low amid a heightened security environment
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Sergeant Timmis declined to discuss other departments' security measures.
Ahead of the visit, the Stop Trump Coalition has announced plans for large-scale demonstrations in Windsor and London.
Security preparations have also been intensified in anticipation of these protests.
The Royal Family will play a prominent role in welcoming the President and First Lady on Wednesday.
The US President and First Lady will are set to arrive in the UK on Tuesday evening
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Their Wednesday morning schedule includes the Prince and Princess of Wales greeting the presidential couple within the Windsor estate, before escorting them to an outdoor meeting with the King and Queen.
The East Lawn at Windsor Castle will host a spectacular aerial demonstration featuring the Red Arrows alongside British and American F-35 fighter aircraft.
Unlike previous state visitors, Trump's itinerary excludes any public-facing activities on his first day.
Their carriage procession, shared with the King, Queen and the Prince and Princess of Wales, will remain within Home Park's private grounds rather than travelling through Windsor town.
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Unlike French President Macron visit in July, Mr and Mrs Trump will not undertake any public facing engagements
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This arrangement differs markedly from French President Emmanuel Macron's state visit, which featured a public carriage journey through Windsor and a London visit to Westminster Abbey's Grave of the Unknown Warrior.
Mr and Mrs Trump will not undertake similar public engagements during their stay.
During their visit, the couple will observe a private honour to the late Queen Elizabeth at St George’s Chapel.
On Thursday, the First Lady will also undertake joint engagements with the Princess of Wales while Mr Trump meets Prime Minister Kier Starmer at Chequers for a summit.