French President Emmanuel Macron said Thursday that France and its allies could have stopped the 1994 Rwanda genocide but lacked the will to do so, a strong declaration ahead of the African country’s 30th anniversary of the slaughter that left over 800,000 people dead.

Macron’s office said in a statement that the French president will release a video on social media on Sunday as Rwanda marks the solemn commemoration of the genocide.

In the video, Macron says that “France, which could have stopped the genocide with its Western and African allies, lacked the will to do so.”