A bomb disposal team has carried out a controlled explosion in Welwyn Garden City.
Police in Hertfordshire said that an Explosive Ordnance Disposal dealt with a flare at the force's headquarters.
A Welwyn Garden City resident told the Welwyn Hatfield Times they heard a loud bang and saw smoke in the area near Stanborough Park and the East Coast Main Line railway at around 2.55pm today (Tuesday, August 23).
A Hertfordshire Constabulary spokesperson said: "This was the EOD disposing of a flare."
They said the flare had been transported to Welwyn Garden City from one of the police's property stores.
A Hertfordshire Fire and Rescue Service spokesperson said they were on the scene of a small grass fire behind the police headquarters in Welwyn Garden City.
They said: "One crew from Welwyn Garden City attended a small grass fire behind the police headquarters."
Both incidents were resolved this afternoon.
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