Armed police were deployed to Chesterfield last night after a stabbing.
Derbyshire Armed Response Unit posted on Twitter: "Night started with a firearms job in Chesterfield following a stabbing - male detained but became violent on arrest.
"Assisted by @DerbysDogPolice PD Zane and his human.
"Spit hood required as subject was gobbing at out staff. Absolutely vile behaviour. Great kit to protect us."
A Derbyshire police spokesperson said: "We were called to reports of a stabbing inside an address in Chestefield, yesterday evening.
“On attending, officers were spat at by a man who was later arrested in connection with the incident.”
We'll bring you more information on this when we get it.