Capital Region Police raided an industrial building at Esjumelar on the Kjalarnes peninsula on Wednesday night and seized 621 cannabis plants at various stages of growth.[1][2] At the same site officers seized about 5 kg of marijuana and a similar quantity of cannabis leaves.[1] Karl Steinar Valsson, head of the force narcotics unit, told reporters the indoor operation was the largest cannabis cultivation his officers had seen and may have run for years.[2]

Two men in their thirties who were at the facility were arrested during the raid.[1][2] Police said on 19 March that both had been released from custody after questioning and that holding them was not necessary for the investigation.[1] Valsson said officers had shut down close to 20 grow houses in preceding weeks and had already seized more than 3,000 plants in 2009, exceeding the 2007 and 2008 totals combined.[2]