BAT YAM, Israel (AP) — A series of explosions Thursday on three parked buses rattled central Israel in what authorities suspected was an attack by Palestinian fighters. No injuries were reported.

The explosions happened on a day when Israel was already grieving after Hamas returned the bodies of four hostages from Gaza as part of a ceasefire deal. The bus explosions were reminiscent of bombings during the Palestinian uprising of the 2000s, but such attacks are now rare.