The unsuspecting policemen ran into the trap laid by Kannur Superintendent of Police Rahul R Nair, after getting several complaints about them demanding bribes from truckers, especially those carrying river sand in violation of rules, police said today.

The SP and two policemen, the latter in lungi and shabby shirts, got into a truck carrying sand to a construction site in the wee hours yesterday. The truck was carrying sand from Ponnani in Malappuram to Mattannur in Kannur district and it had all required papers.