President Nicolas Sarkozy has assured Israeli Prime Minister Benjamin Netanyahu that he is determined to bring to justice the killer of three French-Israeli children and a Jewish teacher.
"You can be assured of the total determination of the French authorities that the perpetrator of this cowardly and ignoble act be arrested and judged with all the severity required by the gravity and seriousness of this crime," he wrote in a letter his office released Tuesday.
"I wish to express my sincerest condolences to you and to all the people of Israel," he wrote.
Those killed in Monday's attack at a school in Toulouse were identified as 30-year-old Rabbi Jonathan Sandler and his sons Arieh, 5, and Gabriel, 4, as well as seven-year-old girl Miriam Monsonego.
The three children were Franco-Israeli citizens.
The bodies of the four victims were expected to leave France on Tuesday evening for burial in Israel.
Sarkozy was to be present at the Paris Charles de Gaulle airport for the arrival of the bodies there.
France has launched a massive manhunt for the killer and declared a terror alert across the southwest.