Siwan Superintendent of Police told ANI that the two are being grilled to procure more details regarding the shocking murder.
Ranjan, a journalist with Hindi daily Hindustan was shot dead by criminals near the Siwan railway station.
Two bullets were fired at the Siwan bureau chief of the daily that hit on his head and neck. He was shifted to a hospital, where doctors declared him brought dead.
According to police, five motorcycle-borne criminals were waiting for Ranjan, who was walking down the road to his home, and shot him twice.
The ruling party Janata Dal-United leader Ajay Alok, told ANI that the government would nab the culprits within 48 hours. "No matter who the criminals are, the government is determined to hunt them down within 48 hours."