Hackers linked to the Chinese government have broken into a handful of U.S. internet-service providers in recent months in pursuit of sensitive information, according to people familiar with the matter.

Beijing has been ramping up its cyberhacking capabilities in recent months. US officials last week said they disrupted a network of more than 200,000 routers, cameras, and other internet-connected devices that a Chinese hacking team, dubbed Flax Typhoon, had infected with malware.

Chinese government-linked hackers have gained access to a handful of U.S. internet service providers in recent months trying to gather sensitive information, The Wall Street Journal reported on Wednesday,