Two teens from the village of Tarshiha in the western Galilee planned to hurl a Molotov cocktail on Jewish vehicles after learning of the death of nine Turkish activists during the IDF's raid on the Gaza-bound flotilla last week.
The two were arrested before getting a chance to carry out their plan. Their remand was extended by a week on Wednesday.
Police arrested the two, aged 15 and 16, on suspicion of preparing a Molotov cocktail and planning to hurl it on drivers near the village.
During their investigation the teens said they were motivated by the killing of civilians by the IDF and noted they learned how to make the explosive device on the internet.
Akko District Court Judge Rahamim Zemach described the event as extremely serious.
Earlier on Wednesday a violent incident was recorded in northern Israel when unknown elements sprayed hate messages on a mosque in the village of Ibtin.
The messages read, "Up for demolition," "Price tag" and "A war will break out in Judea and Samaria." Star of David signs were also sprayed on the building. Police launched an investigation.