The four arrested include two personal security officers of Chadha and two office employees. The police, however, did not disclose their names.
The total number of arrests now adds up to six. Two other employees of Chadha, Madan Rana and Vijay alias Malik, were arrested Monday.
A bloody gun battle Saturday left liquor baron Ponty Chadha and his estranged brother Hardeep dead. It came within hours of another clash between the aides of the two brothers.
