An Associated Press analysis of more than a dozen videos found that the deadly explosion at a Gaza hospital Tuesday was likely caused by a rocket fired from inside Palestinian territory that veered off course and broke up in the air before crashing back to the ground.

Shortly before 7 p.m. Tuesday, a volley of rockets lit up the darkened sky over Gaza. Videos analyzed by The Associated Press show one veering off course, breaking up in the air before crashing to the ground.

Seconds later, the videos show a large explosion in the same area – the site of Gaza’s al-Ahli Arab Hospital.

Who is to blame for the fiery explosion has set off intense debate and finger pointing between the Israeli government and Palestinian militants, further escalating tensions in their two week-long war.