POKHARA: Police on Tuesday arrested four persons in possession of two sets of twelve gauge shotguns and three sets of an improvised firearm from Kaski district. Acting on a tip-off, a police team deployed from Kaski District Police Office arrested Narayan Bahadur Gurung (55), Dil Bahadur Gurung (48), Suresh Gurung (48) and Man Bahadur Thapamagar (54) of Rupa Rural Municipality-7 in the district. Meanwhile, an investigation is underway.