Explainer-What is happening in Sudan? Fighting in Khartoum explained

FILE PHOTO: Drone footage shows birds in the foreground as clouds of black smoke billow over Bahri, also known as Khartoum North, Sudan, in this May 1, 2023 video obtained by REUTERS

KHARTOUM (Reuters) - A conflict in Sudan that erupted on April 15 has wrought havoc in the capital Khartoum, unleashed ethnic violence in Darfur, and uprooted more than three million people, including over 700,000 who have fled into neighbouring countries.

WHAT TRIGGERED THE VIOLENCE?