Three British men are being held in Taliban custody in Afghanistan, including so-called "danger tourist" Miles Routledge, Sky News reported on Saturday.
The other two men are charity medic Kevin Cornwell and another unidentified UK national who manages a hotel in Kabul, the report said.
"We are working hard to secure consular contact with British nationals detained in Afghanistan and we are supporting families," a spokesperson for Britain's Foreign, Commonwealth, and Development Office (FCDO) told Reuters in a statement but did not confirm the details of the British nationals.
Scott Richards from the Presidium Network non-profit which is assisting Mr. Cornwell and the unnamed Briton told Sky News that he believes the pair are in good health and being well treated.
But he added: "There has been no meaningful contact [with the men], there has been no access by international monitoring agencies... and there's been no other form of access to the individuals to date."
"We're very hopeful that contact will be made," he added. His organization hopes that a positive development in the situation could coincide with the end of Ramadan and the celebration of Eid.
Mr Routledge, 23, has gained fame - and attracted controversy - by travelling to dangerous countries and posting about it online.
In August 2021 he was on a "holiday" in Afghanistan when he was caught up in the chaos in the capital as the Taliban took control of the country.
He chose the war-torn country having looked up a list of the most dangerous places to visit in the world, despite the Taliban taking control of more and more of the country at the time.
Mr Routledge thanked the British Army after he was among those evacuated during the Kabul airlift.
He appears to have returned to the country since then.