A church at the site where Jesus is believed to have fed 5000 people with five loaves and two fish has been badly damaged by fire.
Fires were lit on June 17 in the monastery section of the Church of the Multiplication, in Tabgha on the Sea of Galilee.
Israeli police said it was arson.
The flames consumed much of the interior of the monastery and destroyed the roof, leaving only charred remains of Bibles and other objects.
Graffiti scrawled in red Hebrew lettering on a wall outside the church read, “Idols will have their heads cut off”.
Israeli Deputy Foreign Minister Tzipi Hotovely said she condemned the attack “in the strongest terms”.
Police detained 16 Jewish settlers, all of them minors, for questioning over the incident and later released them.