Hackers are stealing eggs from McDonald’s restaurants, stealing cheese from Domino’s and stealing eggs at Chipotle restaurants in Washington, D.C., according to a Washington Post investigation.

The Post obtained a cache of emails, voicemails and other documents from the hack, which began in July, which revealed the extent of the hack.

The hack was first discovered by a cybersecurity researcher who called it “an extremely high-profile attack” by a group called the Minuteman 3, a moniker that the hackers use for a faction of the Anonymous hacker group.

The group is believed to be based in China.

McDonald’s, which did not immediately respond to a request for comment, did not confirm or deny the existence of the hacks.

The chain said it is investigating the hacks and is “taking action to protect our customers and associates from this type of activity.”

The Washington Post reported on the hacks, but not how they were obtained.

A company spokesman said the chain does not comment on any individual investigation.