Detectives investigating the disappearance of Claudia Lawrence have arrested a 59-year-old man from York on suspicion of murder.
Officers says forensic examinations and searches are taking place and will continue over a "number of days". A car has also been seized, as part of the inquiries.
The investigation team says it would like to stress that Claudia "has not been found" and they cannot rule out the "possibility of further arrests in the future".
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Cloud and outbreaks of rain will ease away eastwards during the morning, clearing the east coast around midday with sunny spells developing.
Police and emergency services are attending the scene.
Rebel-held east remains at risk while the pumping station supplying the western part of the city is once again in operation.