Afghanistan has released five UK nationals from detention, London said Monday, adding that it regretted the episode and offering apologies to the authorities in Kabul. “Pleased the UK has secured the release of 5 British nationals detained inAfghanistan,” Foreign Secretary Liz Truss tweeted. The Foreign Commonwealth and Development Office said in a separate statement that the five “had no role in the UK government’s work in Afghanistan and travelled to Afghanistan against the UK Government’s travel advice. This was a mistake.” No further details were given about the Britons nor when they were …