Fidelity Investments, a major mutual fund and financial services firm, is believed to have been targeted by the same hackers which struck JPMorgan Chase, the Financial Times has revealed.

Earlier this month, it was determined that the Chase incident impacted the accounts of 76 million households and seven million businesses in one of the largest known cyberattacks against a financial services firm in the U.S. And on Thursday, sources familiar with the attacks told FT that 13 financial institutions, including Fidelity, had also been attacked by perpetrators behind the Chase breach.

That day, a Fidelity spokeswoman told FT that the company saw “no indication that any Fidelity customer sites, accounts, information, services or systems were affected by [the] matter.” The Secret Service and FBI, however, have launched an investigation on the incidents, perceived as a widescale attack against Wall Street by hackers.