Three masked and armed men abducted a 28-year-old man in Derry last Thursday, the PSNI said.
He was walking along Circular Road in the city around 9.30pm when he was bundled into a car.
Her was battered with a baseball bat, taken to Muff and thrown from the car. He was treated in hospital for a number of injuries.
The latest incident involved Republican Action Against Drugs – it has been condemned by politicians.
In February Andrew Allen was shot dead at his home in Buncrana. His family denied claims he was a drugs dealer.