The armed wing of Palestinian terrorist group Hamas on Tuesday, Jan. 23, published an edited video to media, purporting to show a rocket attack that killed 21 Israeli soldiers in the Gaza Strip.

Israel earlier blamed unidentified Palestinian terrorists for the rocket-propelled grenade (RPG) attack Monday, Jan. 22, which was the deadliest day to date for the Israeli military in its campaign in Gaza.

Hamas had claimed responsibility for the rocket attack.

"Watch the execution by Al-Qassam Brigades fighters of a compound operation against the enemy soldiers and vehicles east of the Al-Maghazi refugee camp," Hamas said in a message released to media, accompanying a video of the attack.

Reuters was not able to independently verify the footage.

Israeli military spokesperson Rear Adm. Daniel Hagari told reporters in Tel Aviv that the militants' rockets hit a building where Israeli forces had laid explosives. The strike caused that building and one next to it to collapse, he said.