Two men have been arrested over the murder of James Brodie – the man wanted by police over the shooting of a jeweller in Nottingham.
The men – one from Nottinghamshire, the other Derbyshire – were arrested at separate addresses this morning and are now being questioned at Grantham police station.
Specialist officers have arrived at Maize Farm in East Heckington, Lincolnshire, where they're carrying out an in-depth search into the whereabouts of James Brodie.
Underground imagery equipment, Cadaver dogs – who search for human remains, and forensic archaeologists have now joined the search.
It's expected that an excavation may take place in the next few days.
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A large tent has been put up around the area while investigations continue.
The kind gesture touched the hearts of many who shared and retweeted words of support for the officer on Twitter.
Two workers were forced into a back office as the robbers tried to force their way into a safe, police say.