(JOHANNESBURG) -- Forty-four children were sent to the Hospital after a swarm of bees attacked them on Friday.

The pre-school group of 80 children between the ages of 2-6 was visiting Bunny Park near Johannesburg. After an afternoon spent playing with the rabbits, the children were waiting to get back onto their school bus, when a massive swarm of bees descended upon the group.

Forty-four of the children were stung and went to the hospital for treatment. Four of the children were critically injured.

Police do not know what prompted the swarm to attack, but they said they did not believe that the attacking bees were the infamously aggressive Africanized honey bees, more commonly known as killer bees.

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