Shin Bet announced five arrests in its investigation into a terrorist cell allegedly linked to Hamas.
The cell was uncovered in March after a firebomb attack on Israeli police caused nine injuries.
Shin Bet told the Israeli broadcaster Arutz Sheva the suspects included one man who spent time in prison for a 2005 stabbing on the Temple Mount. All were from a rough Jerusalem neighborhood.
The suspects told authorities the firebombing was retaliation for what the suspects saw as desecration of the Koran by Israeli police, the report said. The suspects accused police of throwing the holy book on the ground, but Shin Bet said it fell off a shelf accidentally.