Ludhiana, April 13 -- After Gurpatwant Singh Pannu of banned group Sikhs for Justice (SFJ) issued a warning of explosions and offensive slogans to be plastered on public walls for celebrating birth anniversary of Dr BR Ambedkar, the police initiated special checking drive under 'operation Satark' on Friday night.

Additional director general of police (ADGP, traffic) AS Rai led the operation in Ludhiana with commissioner of police Swapan Sharma.

Addressing the media near Ludhiana Railway Station, Rai stated that an alert is already sounded in Punjab and all senior officers are on the roads on checking duties.

Total of 12 checkpoints in place

In Ludhiana a total of 12 checkpoints have been installed in the city following the intelligenc...