Confirmed in today’s in-game “New Updates” section, Remote Explosives are coming soon to Fortnite: Battle Royale! First leaked in a v3.2.0 data mine, the Remote Explosives (also known as C4 previously) will be coming in this weeks patch!
It is unclear if these will be an item that is thrown or placed and detonated remotely. The latter will make them more like a trap item, and may encourage camping as you wait to explode your enemies!
As per usual, information in the in-game news section typically gets released in the next patch. Patch v3.3.0 for Fortnite: Battle Royale will be coming this Thursday, and will most likely include the Remote Explosives!