Cryptocurrencies of non-fungible token (NFT) marketplaces dipped during Wednesday U.S. morning hours following news of OpenSea facing potential U.S. regulatory action.

Adding to earlier losses alongside a broad crypto decline begun Tuesday evening U.S. hours, Blur (BLUR) fell another 5% in the minutes following the news before a modest bounce. It’s now down 10% over the past 24 hours. Tensor (TNSR), a Solana-based NFT marketplace aggregator, also traded 3% lower. The token’s price was down nearly 9% over the past 24 hours. The broader CoinDesk 20 Index was lower by 4% over the same time frame.

The morning price action happened as OpenSea’s CEO said the platform received a Wells notice from the U.S. Securities and Exchange Commission alleging that the digital arts sold on the marketplace are securities.

Read more: OpenSea Gets Wells Notice From SEC, Calling NFTs Sold on Platform Securities