Though no Naxal link has been found prima facie, official sources said there was a need for a thorough probe to find out the truth into it.
Sources said there were intelligence reports of CPI(Maoists) setting up urban bases in different cities, including Gurgaon.
Maruti Suzuki's General Manager Human Resources was charred to death in the violence in its car plant allegedly triggered by workers yesterday for which over 90 workers have been arrested. Nearly 100 others were injured in the violence.