A village panchayat head was arrested on Monday while a JD-U leader and two others were detained after a RTI activist and his friend were shot dead by criminals in Bihar's Jamui district, police said.
Hundreds of angry residents blocked a road, burnt tyres and shouted slogans against the state government to denounce the killings, disrupting traffic on National Highway 333.
Valmiki Yadav and his friend Karu Yadav were attacked by motorcycle-borne assailants near Bichwe village on Sunday evening.
Panchayat head Krishna Ravidas was arrested and Janata Dal-United block president Suresh Mahto and two others were detained for interrogation, said police officer Rampukar Singh.
"Prima facie, it seems to be a pre-planned conspiracy," he said.
Valmiki Yadav is said to have exposed several rackets and financial irregularities in the public welfare schemes and developmental works in the district.
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This is the third such crime in the last three months. A Right to Information (RTI) activist was shot dead in Vaishali district in April whereas another RTI activist was shot dead in East Champaran district last month.
--IANS
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