Detectives have named a missing 19-year-old woman - who police fear has been murdered - as Amelia Arnold.
Police and scene-of-crime specialists are examining a property in Hadrian's Walk in Stevenage.
Witnesses who may have seen suspicious activity at the address between Wednesday and Friday are also being asked to come forward.
More top news
Ross Brennan, 28, conspired with Aarron Gledhill, 30, to import and sell powerful class A drugs to thousands of customers.
Pyongyang's foreign minister said Donald Trump's aggressive rhetoric is regarded as a legitimate "declaration of war".
Former congressman Anthony Weiner has been jailed over an underage sexting scandal which helped rock Hillary Clinton's election campaign.