The images are grainy.<br/> <br />But this video circulating the Internet claims to show two militants firing rocket-propelled grenades at a passing container ship in Egypt's Suez Canal.<br/> <br />Reuters cannot verify the video.<br/> <br />But on Saturday canal authorities said terrorists had staged just such an attack to disrupt this critical global waterway.<br/> <br />The video shows a back Islamist logo but no Islamist websites have claimed responsibility.<br/> <br />Egyptian authorities are confident the attack was random and say three people have since been arrested.<br/> <br />And the incident hasn't affected canal traffic.<br/> <br />But Egypt has faced a string of militant attacks in this largely lawless North Sinai region after the army overthrew the country's first elected Islamist President in July.
