Police from the District Support Team in Derry seized suspected Class A drugs while on patrol in the city last night.
Officers made the seizure after stopping a woman in the Mount Street area.
The woman, who is in her 50s, was arrested on suspicion of possession of a Class A controlled drug, possession of a Class A controlled drug with intent to supply, being concerned in the supply of a Class A controlled drug, and possession of a Class C controlled drug.
She remains in custody while enquiries are ongoing.
