KOLKATA, July 31 -- The Central Bureau of Investigation (CBI) has arrested two brothers in connection with the murder of Chandranath Rath, personal assistant of West Bengal chief minister Suvendu Adhikari, agency officials said on Friday.

The accused, identified as Sagar Sonkar and Sahib Sonkar, were Bharatiya Janata Party (BJP) workers and were part of Rath's team.

A CBI official said the two brothers had been arrested on charges that they planned the murder, starting from arranging the shooters, providing logistics and even helping them conduct the recce.

It is alleged that the Sonkar brothers were involved in the conspiracy at the behest of a leader from a rival political party.

Rath, 41, a former Indian Air Force officer, was shot...