A PROMINENT Dartmoor farmer and national park authority member was last week arrested after police seized nearly 200 cannabis plants at his property near Chagford. The 69-year-old man was among four others quizzed after a drugs raid on barns and outbuildings. Police, who have not confirmed the identity of those detained, revealed that 189 large cannabis plants with a street value of £75,000 were taken away from the drugs factory just outside Chagford last Thursday. Others questioned by officers at Launceston Police Station after the swoop were a 25-year-old man from Kingsteignton, a 49-year-old man from the Chagford area and a 34-year-old man from Cullompton. All four were later released on police bail pending further inquiries, including analysis of the plants and growing equipment seized from the farm buildings. It is understood police had to hire a large vehicle to take away what they described as a 'significant' haul. West Devon sector commander Insp Andy Oliver said: 'All those questioned were arrested on suspicion of being concerned in the production and supply of cannabis. Some 189 plants were taken away. They had an estimated street value of £74,800. 'This was a big operation.' He added: 'It was a significant find and comes on the back of one just a few weeks before in Okehampton where drugs and cash seized were valued at £100,000.' He said all four men would be questioned again by officers in August. Growing cannabis can attract a substantial prison sentence, depending on the offender's role in the crime.