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By Paul Goldman

TEL AVIV — Israeli police have launched an investigation after “very serious” video footage emerged which appeared to show Jewish wedding-goers celebrating the death by arson of a Palestinian toddler.

The video was aired on Israel's Channel 10 news, which said it was filmed three weeks ago at the wedding of a couple "very well known" to the radical right.

It appears to show a masked man stabbing a photo of 18-month old Ali Dawabsheh, who died from an arson attack on his home in the Israeli-occupied West Bank town of Duma. The footage also shows young men holding what appear to be knives and rifles in the air.

A July 31 photo of the aftermath of the arson attack on the Dawabsheh family's home.Abed Omar Qusini / Reuters

Israel's Prime Minister Benjamin Netanyahu condemned the "shocking pictures," saying in a statement that the video underscored the need to curb Jewish extremism.

The Samaria and Judea District Police told NBC News Thursday that an investigation is underway into whether any offenses — including incitement — had been committed.

"Very serious investigation material was collected from the video which allowed the prosecution to open a police investigation," police said in a statement.