Farhad Mohammad Sheikh, described by the NIA as their 'close criminal associate' and the last man to be arrested so far in the case, was also remanded to further police custody.
Udaipur murder: Facebook removes video glorifying the crime; suspected Pakistani numbers recovered from PFI member
Looking at a possible threat to communal harmony in Udaipur, the police wrote a letter to Facebook seeking its removal and the video was immediately taken down.
The officials said that an IPDR analysis would be carried out on their phones to check their activities on the Internet.
This has come as a major setback for the tourism industry, which is the main source of livelihood for a majority of people in the city.
Udaipur tailor Kanhaiya Lal was hacked to death on Tuesday by Akhtari and Ghouse who said in a video posted online that they had avenged an insult to Islam.
Riaz Akhtari and Ghouse Mohammad were arrested on Tuesday, hours after they allegedly hacked the tailor to death with a cleaver at his shop.
Udaipur murder: Rajasthan BJP minority wing denies Congress allegation, says accused not linked to party
After a photo showing Riaz Akhtari with some local BJP leaders of Udaipur emerged, Mohammad Sadiq Khan, state president of the BJP Minority Morcha, said the photo cannot be a held as a proof.
The arrested were co-conspirators of the murder of tailor Kanhaiya Lal and they are being interrogated, an official said on Friday.
Riaz Akhtari, seen killing the tailor in a grisly video clip, used to work as a welder, while his accomplice Ghouse Mohammad took up petty jobs for a living, police sources said on Wednesday.