Support from around the world and the unity of the Jewish people are helping Eva Sandler cope with the murder of her husband and two young sons in Toulouse last week.

"God gives me the strength; without it, I would not be able to stand," she told Israel's Channel 2 on Sunday. "The truth is that I see the unity of the Jewish people, and that strengthens me the most.

Footage of Mohammed Merah's shooting attacks in Toulouse has been obtained by the Paris branch of Arabic-language satellite news channel Al Jazeera.

The channel gave the memory stick, said to contain two clips of up to 25 minutes of video footage, to investigators on the case.

The rabbi who lost his life at the age of 30 on Monday morning was a much-loved teacher who touched the lives of those he taught.

Rabbi Jonathan Sandler, who was murdered alongside his two sons and another young girl, had returned to France to teach at the Ozar Hatorah school in Toulouse last year.

"God forbid that the recent killer of Jewish children and a rabbi in France be a Muslim or of Arab descent," I tweeted a day before the French authorities named Mohamed Merah as the prime suspect in last week's terrorist atrocity. People on Twitter responded to me saying: "He also killed Muslims".

There were surveillance cameras and a tall fence around the Otzar HaTorah school in Toulouse. But the cameras were not manned and there was no guard.

The tragedy was "an accident waiting to happen" according to a British member of the city's Jewish community.

The suspected murderer of four Jews at a school in Toulouse and three French paratroopers has been confirmed dead in gunfire with police.