By Our Reporter The Biplav-led group seems to have gradually treading the path of his previous mother party by planting bombs and killing people. The Maoist party,his mother party, which is now in power, had intensified their killing spree in the same manner. On Friday, three persons, including a police inspector were killed in bomb blast occurred in Dhanusha district. The powerful explosion had occurred near a house belonging to Rajesh Sah in Mahendranagar area of Chhireswarnath Municipality-5. House owner 47-year-old Rajesh Sah and his son Ananda Shah died on the spot while police inspector Amir Dahal died while undergoing treatment in Dharan. The blast took place immediately after the police team reached the site. Three others who sustained injuries were police constable Rija Nath Kumar Mahato, house owner Shah's another son Prakash,15, and daughter Anjali, 19, According to the victim’s family members and relative of Sah, the incident happened when Rajesh came out of his home for a pee and saw a polythene bag hanging in front of his door. Seeing the suspicious thing, he then immediately informed the police. Deceased Rajesh Sah was a pharmaceutical shop owner in Mahendranagar. Police had arrested two sisters, Lalita Devi Mahara and Sita Devi Mahara of Hansapur Rural Municipality suspecting their involvement in the explosion. They are associated with the Biplav-led group. Likewise,Ramjiwan of Sabila Municipality was also taken under control. Deceased Sah used to lend money in high interest rate. It was suspected that he was made target when he exerted pressure on a man close to Biplav-group to pay back his money.