Ambrey said the ship had reported a group claiming to be the "Yemeni Navy" had demanded the change in course.
The seizure of Bahamas-flagged Galaxy Leader is "another act of Iranian terrorism," Prime Minister Benjamin Netanyahu charged.
EverC has unveiled global transaction fraud trends, showing that transaction laundering dominates illicit payment activity
Iran is increasing its threats to shipping and also seeking to harass US naval forces in the Persian Gulf and Gulf of Oman.
Experts said the volume of piracy could double and reach $60 million, according to Russian state news agency TASS.