Two men have been arrested after separate drug seizures in Dublin on Friday.

In the first operation a car was stopped in the Ballyfermot area and a search was carried out.

Approximately 20kilos of diamorphine and cocaine was found, and a man in his late 20s was arrested.

He is currently being detained at Clondalkin Garda station under Section 2 of the Criminal Justice Act.

In the second operation, a car was stopped and searched at Parkwest Road in Ballyfermot.

Some 22.5 kilos of diamorphine and cocaine was seized here.

A 51-year-old man was arrested in connection with this separate investigation, and is detained at Clondalkin Garda station.

In a follow up operation at a commercial premises in the Kylemore Industrial Estate, approximately 1.8 kilos of cannabis resin was discovered.

Both these seizures have a combined estimated street value of €4m.

Gardaí say these were the result of an intelligence-led operation by Gardaí attached to the Garda National Drugs and Organised Crime Bureau.

The investigation is ongoing.