Israel Defense Forces video shows a tunnel in Gaza, said to be where Hamas militants recently killed six Israeli hostages. NBC News cannot verify the location, or the findings and conclusions of the IDF.

The hostages, whose bodies were recently recovered, appear to have spent the last weeks of their lives in a tight and humid tunnel about 20 meters underground.

Six hostages of Hamas were found dead in a tunnel in Rafah, sparking protests in Israel for a cease-fire deal. Here are their identities.