The senior Congress leader later tweeted that the guilty will not be spared. Eight accused have been arrested in the case.
The death toll increased to 38 by Friday night. While 13 people died in Tarn Taran, 11 died in Amritsar and eight in Batala.
Eight people have been arrested so far in connection with the deaths. The police have arrested Balwinder Kaur, a resident of Muchhal village, under Section 304 of the IPC (punishment for culpable homicide not amounting to murder) and under provisions of the Excise Act, said the DGP.
Punjab Director General of Police (DGP) Dinkar Gupta said the first five fatalities were reported from Mucchal and Tangra villages in Amritsar's Tarsikka on the night of July 29.
On Friday, five people died in Batala, taking the death toll in the city to seven, said Gupta, adding that four fatalities were reported from Tarn Taran.
Singh has the directed police to launch a search operation to crack down on any illegal liquor manufacturing unit operating in Punjab.
The inquiry will be conducted by the Jalandhar Divisional Commissioner along with the Punjab Joint Excise and Taxation Commissioner and the SP (Investigation) in the concerned districts.
Dinkar Gupta said a huge quantity of toxic liquor, drums, storage cans, etc have been recovered from the accused and the same has been sent for chemical analysis to check for constituents of the illegal liquor, a government statement said, adding, more arrests are likely.