Detectives are continuing to question three men over the disappearance of York Chef, Claudia Lawrence.
The men, all in their fifties, were arrested yesterday on suspicion of murder.
Police say searches are expected to continue over the coming days.
A decision is expected over a controversial plan to create what could be the world's biggest potash mine in the North York Moors National Park.
Conservationists say it will blight the landscape but the firm behind it says it will create more than 1,000 jobs.
Council members will decide for or against the plans at a meeting today.
Police investigating the disappearance of Claudia Lawrence say that identifying three men arrested today could damage the investigation.
As with the previous arrest last month, I strongly advise the media and members of the public against identifying the men who have been arrested. This is to ensure the investigation and legal process are not compromised or potentially damaged in any way. This includes naming or publishing images of the men, their home addresses, places of work, their vehicles and properties being searched on traditional media platforms or social networking sites. I urge everyone to again show restraint and patience while we carry out these very important enquiries. Your co-operation and support is greatly appreciated by the investigation team.
Police investigating the murder of Claudia Lawrence have arrested three men on suspicion of murder.
They are all aged in their 50s and from the York area.
Another man was arrested in March this year and remains on police bail.
Officers say Claudia has not been found, but her family has been informed of the arrests.
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