"We have lodged a FIR against 50 persons while eight have been arrested so far. The search for others is going on," a senior police officer told IANS on Tuesday.
He added that "action has also been taken against seven policemen for failing in their duties".
According to eyewitnesses, the mob of over 250 tried to beat the men in the trucks and also attempted to set a truck on fire.
The policemen faced a tough time in rescuing the Tamil Nadu officials, accompanying the truck in different vehicles, along with the truck drivers and the cleaners.