JERUSALEM, Dec. 23 (JTA) — An Israeli was killed this week on a kibbutz in the northern Galilee, apparently after a hand grenade was thrown at him. The blast was not a terrorist attack, Israeli media reported. Gabi Metzer, 50, the treasurer for Kibbutz Sde Nehemiah, was critically injured when he picked up his bicycle from a repair shop. He later died of his injuries. Children on the kibbutz may have found the grenade, the daily Yediot Achronot reported. They then may have thrown it toward an open field, but hit Metzer instead. Security officials have not reached any definitive conclusions.