It went on to say soldiers found and dismantled tunnel shafts and observation posts belonging to Hamas.
Reuters was not able to independently verify the location or the date when the video was filmed.
Israeli military spokesman Rear Admiral Daniel Hagari said soldiers found a holding area, five narrow rooms behind metal bars, toilets, mattresses, and even drawings by a child hostage who was freed during a November truce.
No hostages were there when it was discovered.
The military released photos from the underground labyrinth and said it brought in journalists to document the tunnel before it was destroyed.
