Nomad said in a tweet that she was “aware of the incident” and was investigating, without giving further details or the value of the theft.
Crypto analytics firm PeckShield told Reuters that $190 million worth of users’ cryptocurrency was stolen, including ether and USDC stablecoin. Other blockchain researchers put the number at more than $150 million.
San Francisco-based Nomad did not immediately respond to a request for comment.
The company, which last week raised $22 million from investors including the main US exchange Coinbase Global, is building software that connects various blockchains – the digital ledgers that underpin most cryptocurrencies.
The theft targeted the Nomad “bridge” – a tool that allows users to move tokens between blockchains.
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Blockchain bridges are becoming a growing target for theft, which has long plagued the crypto sector. More than $1 billion has been stolen from bridges so far in 2022, according to the London-based blockchain analytics firm Elliptic.
In June, US crypto firm Harmony said thieves stole $100 million worth of tokens from its Horizon Bridge product.
In March, hackers stole $615 million worth of cryptocurrency from Ronin Bridge, which is used to transfer cryptocurrency in and out of the Axie Infinity game. The United States has linked North Korean hackers to the theft.
Nomad has described itself as a “security first” company that will keep users’ money safe.