A Sierra Leone mining operation discovered a 476-carat rough diamond at the Meya deposit in the nation’s Kono district last week, its owner announced Friday. Meya Mining, a subsidiary of Namibia-based conglomerate Trustco Group, found the diamond, which ranks as the fifth-largest rough ever found in Sierra Leone, according to Rapaport records. “Any value indication of the diamond is pure speculation at this stage, as the diamond has not yet been examined and assessed by the necessary experts,” Trustco said.

Torrents of water rushed through the streets of the Sierra Leone capital of Freetown on Monday, causing mudslides that killed hundreds and trapped hundreds more in their homes and vehicles, officials said. As many as 200 people were killed after heavy rains overnight deluged the city’s poor drainage system and created one of the most devastating floods Freetown has experienced.

The epidemic has waned, but the virus still threatens the lives of women and children in West Africa. By Matt Hongoltz-Hetling.