US crypto firm Nomad has been hit by a $190 million theft, blockchain researchers said on Tuesday, the latest such heist to hit the digital asset sector this year.
Nomad said in a tweet that it was "aware of the incident" and was currently investigating, without giving further details or the value of the theft.
Crypto analytics firm PeckShield told Reuters $190 million worth of users' cryptocurrencies were stolen, including ether and the stablecoin USDC. Other blockchain researchers put the figure at over $150 million.
San Francisco-based Nomad did not immediately respond to a request for comment, Reuters reported.
The company, which last week raised $22 million from investors including major US exchange Coinbase Global , makes software that connects different blockchains - the digital ledgers that underpin most cryptocurrencies.
The heist targeted Nomad's "bridge" - a tool which allows users to transfer tokens between blockchains.
Blockchain bridges have increasingly become the target of thefts, which have long plagued the crypto sector. Over $1 billion has been stolen from bridges so far in 2022, according to London-based blockchain analytics firm Elliptic.
In June, US crypto firm Harmony said that thieves stole around $100 million worth of tokens from its Horizon bridge product.
In March, hackers stole around $615 million worth of cryptocurrency from Ronin Bridge, used to transfer crypto in and out of the game Axie Infinity. The United States linked North Korean hackers to the theft.