The French soldier was on a group patrol as part of a national protection program when he was attacked from behind, prosecutor Robert Gelli told Europe 1 radio.

NPR: French Soldier Stabbed In Throat Outside Paris

The assailant did not say a word, Gelli said.

NPR: French Soldier Stabbed In Throat Outside Paris

The school's business and enterprise teacher Tim Williams said the cows were in an ideal place to give companies maximum exposure as Gelli Aur Country Park is popular with hundreds of visitors.

BBC: The idea has won the pupils first prize in a competition