Three people in their 20s were arrested and cash, drugs and weapons seized after reports of drug dealing in Burgess Hill.
Specialist Enforcement officers in plain clothes visited Fairfield Recreation Ground on Wednesday, June 8.
Having spotted a man behaving suspiciously, they searched him, finding cannabis, two wraps of suspected cocaine, and a large quantity of cash.
At a search of an address in West Street, Burgess Hill, a larger quantity of herbal cannabis was found, including in individual deal bags as well as in a carrier bag and inside a tin of chocolates.
Bags containing white powder suspected to be cocaine, a commando style knife and incapacitant spray were also found at the address.
Following the searches, a 24-year-old man was arrested on suspicion of possession of a class A drug with intent to supply and with acquiring, using or possessing criminal property.
A 26-year-old man linked to the address was arrested on suspicion of being concerned in the supply of a class A drug, and a 25-year-old woman was arrested on suspicion of being concerned in the supply of a class A and class B drug, and with possession of a firearm without a valid certificate.
All three have been released under investigation while enquiries continue.