Emergency services were called to a serious crash in Barley.
The incident happened along the B1039 - the road to Royston. The road also connects to the B1368 which connects to Barkway.
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At about 12.30pm, Herts police tweeted: "We're currently at the scene of a serious collision in Bakers Lane in #Barley #Royston .
"Road closures have been put in place and motorists are advised to avoid the area. Thank you for your patience."
The Crow is awaiting further details from the emergency services.
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