With vocal expressions of disapproval being reiterated time and again against building six new canals on the Indus River, the nationalist parties of Sindh organized protests and blocked highways in different parts of the province. Meanwhile Jeay Sindh Mahaz also blocked the National Highway in Shaheed Benazirabad district on Sunday, demanding safe recovery of the lawyer Aamir Ali Umrani who has allegedly been subjected to enforced disappearance, the Tribune reported.