Heroin with a street value of over £11,000, destined for the streets of Pembrokeshire, has been seized in the last few weeks.
As part of Operation Poker around two ounces of heroin has been seized.
One person was arrested by officers in Newtown while driving back to Pembrokeshire and half an ounce was seized.
Another ounce was seized when a man was stopped by British Transport Police in Bristol when getting on a train to Pembrokeshire.
A further half an ounce was recovered from a house in Claberston Road.
Superintendent Reg Bevan said: "Operation Poker is very much about targeting dealers of heroin and helping users break their habit.
"Dealers may think Pembrokeshire is an easy area to target but they are wrong as we are targeting them.
"These incidents also demonstrate how other forces are helping us prevent drugs getting into the county."
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