South Wales Police officers spotted a suspicious vehicle on Five Mile Lane, Barry.
With the help of the Police Helicopter (NPAS), officers were able to track down and arrest two men for possession with intent to supply class C substances.
Sgt Rollnick from Barry NPT said: “These two suspects had been on our radar for a few weeks. Eventually their luck ran out. Drug dealers in Barry have to be lucky every day, we only have to be lucky once.
“We relentlessly pursue drug dealers in this town, and one by one they can expect prison.”
If you have any information on drug dealing that you would like to report anonymously please call Crimestoppers on 0800 555111.