Wu said he learned that, according to security firm Blockaid, on July 22, 2026 at 21:30 (UTC), it detected an attack targeting the Arbitrum ecosystem protocol AFX. The attack targeted a cross-chain bridge operated by AFX, and currently about 24.15 million USDC has been stolen. Blockaid said its team is working with the Arbitrum team to assist with incident response, contact affected protocol parties, and help control the flow of the stolen funds. This incident involves AFX’s self-operated bridge, not an official Arbitrum bridge.