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."
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Nearly 38,000 runners will hope to complete Sunday's London Marathon making it the biggest event in its 35-year history.
Rain across central Britain with longer, intense downpours with thunder in places this evening. A lucky few will stay sunny and dry.
Planning on going to the London Marathon tomorrow? Read our handy guide first!