The order was passed by Special Judicial Magistrate (CBI) Mirza Jeenat on an application moved by the agency.
The police remand would start from 10 AM tomorrow.
The CBI yesterday arrested the seven accused in Pratapgarh district.
CBI sources had said the seven persons allegedly incited the mob to kill the DSP, who had arrived on the scene after getting information about the murder of village head Nanhe Yadav.
They said one of the persons, who allegedly led the mob to kill the officer, was Bhulle Pal.
More From This Section
Yadav, Saroj, Gautam and Ramashray were associates of village head Nanhe Yadav, who was murdered hours before the killing of the DSP, while Chhote Lal Yadav and Munna Patel were his neighbours.
CBI sources claimed Haq, who was posted as Deputy Superintendent of Police at Kunda, had reached Nanhe Yadav 's house after getting the news of his murder on March 2.
By the time he approached the site, the news of Yadav's murder had spread and a large crowd gathered outside his house which was angry at the alleged apathy of the police and protested the police's alleged failure to stop the murder.