Kathmandu, Sept 18: The police have released Dipendra Rai, who was arrested in connection with murder of four persons at Gairigaun in Tinkune, Kathmandu. Rai was released after it was revealed in police investigation that he had no involvement in the killing, said Senior Superintendent of Police Somendra Singh Rathaur of the Kathmandu Valley Crime Investigation Office. According to him, Rai was released after his involvement in the murder was not found. In connection with the murder, the police arrested and made public Sanjaya Bhandari, 23, of Bahrabise in Sindhupalchok district, currently living in Kandaghari, Kathmandu. Bhandari has admitted to his involvement in the murder, said the police. On Friday midnight, Nabin Rai, 19, and Kumar Bhujel, his spouse Ambika Bhujel and mother Sumitra Bhujel, 70, were found murdered at a sawmill in Gairigaun in Tinkune.