It was discovered during a number a searches on Thursday night.
Officers and student officers attended a number of incidents, including 3 domestic ones.
Knuckle dusters are banned from being imported, made or sold in the UK.
It is also a crime to carry such a weapon in a public place.
Police hunt for wanted Plymouth man
He has links to the city centre
Authorities warn against displaying George's Cross
Union flags have also been seen
Student standing up for children let down by SEND system
16-year-old says she received a lack of support
Exeter city councillor defies call to resign
Opponents say wearing lanyard breached code of conduct
Cornish man jailed for killing his brother
Life for Daniel Lynch
‘Dumping ground’ safety fears at popular beach
Children play and swim there
