Sir: An undeclared embargo has been announced by some of the Balochistan-based oil refinery and power companies in Arabian Sea near Churna Island, between Gadani to Mubarak Village, which is creating hurdle in fishing for the fishermen of the Mubarak Village in the sea. The factories have stationed their guards in sea, who are harassing the fishermen while fishing near Churna Island. Several complaints have been received from fishermen against the guards, who illegally opened aerial firing on fishing boats. It is humble requested to the management of those factories to take action against their guards otherwise we have rights to protest against inhuman attitude. SARFRAZ HAROON Karachi Published in Daily Times, March 20th 2018.