Three people have been arrested on suspicion of drug dealing and possession of a firearm.

Hertfordshire police carried out warrants at an address in Pickford Hill and Noke Shot, Harpenden, at around 7pm yesterday.

A 44-year-old man and a 30-year-old woman, both from Harpenden, were arrested on suspicion of possession of Class B drugs with intent to supply, and a firearm which police believe could be CS gas.

An 18-year-old man, also from Harpenden, has been arrested on suspicion of being “concerned in the supply of a controlled drug”.

All three have been released pending investigation.