Kelp has temporarily halted rsETH contracts on the Ethereum mainnet and several Layer 2 networks following the detection of suspicious cross-chain activity. According to NS3.AI, the company has initiated an investigation into the potential attack and is collaborating with LayerZero, Unichain, audit firms, and security experts to conduct a thorough root cause analysis. Kelp plans to publish a post-mortem report once the investigation is complete.