Police are searching a house on Burnholme Grove, in York. The semi-detached house is about half a mile from Claudia Lawrence's house.
A police van was parked outside the property and a number of forensic science officer could be seen inside in white overalls.
The house, which has a drive and pebbled front garden, is about half-way down a quiet cul-de-sac.
More top news
A possible ninth planet at the edge of the solar system could be the reason behind one of the biggest mysteries in astronomy.
Philip Thomas was a 10-year-old pupil at Pantglas Junior School in Aberfan when a coal tip collapsed and slid downhill.
The chief executive's resignation comes amid controversy about allegations of doping in cycling.