SINAI, Egypt: Hundreds of workers of the Nasr Navigation Company in North Sinai Governorate blocked the Qantara Arish highway Saturday to protest an armed attack on the company. Workers sa id armed men in five cars attacked the headquarters and fired into the air. Sources said hundreds of the company's labors blocked road outside the company headquarters after their colleague, Mahmoud Salmi, was injured during the attack. Workers, demanding security forces to protect the company, prevented vehicles from passing in both directions, leading to a traffic jam.