A cryptocurrency trader was trading in Uniswap V3's USDC-USDT liquidity pool on Wednesday when a suspected "sandwich attack" caused his $732,000 USDC to be exchanged for only $18,600 USDT, losing more than $700,000. According to on-chain data analytics, the incident may have been initiated by a MEV (Maximum Extractable Value) bot. The bot emptied the liquidity pool by preemptively trading, causing price imbalances and paying the block builder to prioritize its transactions. DeFi researcher Michael Nadeau pointed out that this attack uses the order of transactions to manipulate prices for profit. In addition, some analysts speculate that such anomalous transactions may be part of money laundering. DeFiLlama developer 0xngmi said that by structuring transactions that are easy to be arbitraged by MEV robots, money launderers can move funds with almost no loss. At present, the incident is still under further investigation.