The German Navy Blog MarineForum reports without attribution:

1 Dec., EGYPT
Update: 12 Nov incident (with one navy vessel set ablaze and 8 people killed) alleged to have not been battle with smugglers nor fishermen … instead, ISIL terrorists / Sinai militants said to have hijacked the Egyptian navy vessel for an attack on Israeli Mediterranean installations (offshore platforms?) … when Egyptian navy realized the situation, the boat was pursued and finally intercepted.
(rmks: unconfirmed local media reports)