Patna:�Rajdeo Ranjan, the Siwan bureau chief of a Hindi newspaper was shot dead at a busy market near the Station Road on Friday night.
Four suspects have been detained in connection with the killing of a senior journalist of Hindi daily Hindustan in Bihar's Siwan district, police said on Saturday.
"A manhunt has been launched to arrest the killers soon."
The Bihar Police headquarters sent a Special Task Force (STF) and Special Operations Group to Siwan late Friday night.
"We will nab the people behind the killing and will not spare any one," Bihar Police chief P K Thakur said.
Rajdeo Ranjan's family said he had no enmity with anyone and was busy preparing for the last few days to celebrate his 17th marriage anniversary.