At the Bouba N'Djida reserve in Cameroon about half of the elephants were recently killed by poachers.
The World Wide Fund for Nature said they sent in too few security personnel to take out the poachers.
The demand for jewelry and ornaments made from tusks in Asia is blamed for the poaching.
This recent killing has been described as the worst massacre in decades.
A WWF rep said:
'WWF is disturbed by reports that the poaching continues unabated.'
The Central African state has sent in special forces to track down the poachers but the WWF says it may be too little, too late.
'The forces arrived too late to save most of the park's elephants and were too few to deter the poachers.'
It's sad that these majestic creatures are being destroyed all for the sake of jewelry.