On 14 July 2006, Hezbollah forces fired a C-802 anti-ship missile at the Israeli corvette INS "Hanit", killing four sailors and inflicting substantial damage. A second missile missed its target and destroyed a civilian merchant vessel. Sources disagree on whether the missile used was an OEM Chinese-made missile or an Iranian-made clone. Sources disagree on who was responsible for firing the missiles, with Hezbollah, the Syrian Army, or the Islamic Revolutionary Guard Corps being implicated. Iran denied involvement in the incident while others disagree. The same year, Israel destroyed ten Lebanese Armed Forces radar stations along the coast, possibly because Hezbollah gained access to them to launch anti-ship missiles. In a May 25, 2010 speech, Hassan Nasrallah promised to attack Israeli naval ships and Israeli-bound commercial shipping. Some have speculated that Hezbollah has semi-submersibles, swimmer delivery vehicles, or even submarines, though these are not confirmed.