The attorney general of the United Arab Emirates said that the co-pilot had been inspired by the Sept. 11 attacks after years of descending into extremism.
Nearly 20 commercial ships, mostly tankers, have come under attack over the past month while sailing through Hormuz, the Persian Gulf or off the coast of Oman.
Representatives from governments, civil society and academia meeting in Muscat, Oman on Monday called for urgent action to address a global housing crisis affecting nearly 3.4 billion people.
The so-called OPEC+ subgroup -- Saudi Arabia, Russia, Iraq, Kuwait, Kazakhstan, Algeria and Oman -- will meet again on Nov. 1 to review conditions in the oil market.