The Press Association has reported that an Italian coastguard plane is involved in the search mission for a missing F-16 jet.
Rescue boats are also involved, as well as three cargo ships, that were asked to help out with the search.
Commander Cosimo Nicastro of the Italian coastguard said: "The visibility is already poor because it is night, but there is also sleet."
More top news
Life may have evolved on at least three planets in a newly discovered solar system just 39 light years from Earth, scientists believe.
President is 'planing to overturn' guidance ordering schools to allow trans students to use the toilets matching their gender identity.
Republican politicians have faced a barrage of questions about the Trump administration's agenda during hostile town hall meetings.