AN attempted hijacking of a commercial vessel in the Gulf of Aden appears to have been carried out by armed Somali pirates and not Yemeni Houthis, despite the firing of missiles from Houthi-controlled territory in Yemen afterwards, the Pentagon said on Monday. "We're continuing to assess, but initial indications are that these five individuals are Somali," said Pentagon spokesperson Brigadier General Patrick Ryder. "Clearly a piracy-related incident," Ryder added. A U.S. Navy warship responded to a distress call on Sunday from the chemical tanker Central Park. The attackers were taken aboard the U.S. warship Mason, the U.S. military said, and…