The chairman of the joint chiefs of staff and other top military leaders have entered quarantine after a senior Coast Guard official tested positive for the coronavirus, two U.S. officials said.

Gen. Mark Milley and the chiefs of the Army, Navy and Air Force have tested negative for the virus, but remain under quarantine as a precaution, said the officials, who spoke on condition of anonymity to discuss information not yet made public. The head of U.S. Cyber Command, Gen. Paul Nakasone, was also among those quarantined.

The officials said the military leaders were working from home and this has not affected military readiness.

Up to 14 officials are believed to have been potentially exposed to the virus after meetings last week with the vice commandant of the Coast Guard, Adm. Charles W. Ray, who has tested positive. The officials were informed about the positive test on Monday.

It is not known how Ray contracted the virus, but it was not believed to be related to the outbreak affecting President Donald Trump and others at the White House, the officials said.

Ray had "mild symptoms over the weekend," according to the U.S. Coast Guard.

"Out of an abundance of caution, all potential close contacts from these meetings are self-quarantining and have been tested this morning.  No Pentagon contacts have exhibited symptoms and we have no additional positive tests to report at this time," a statement from the Department of Defense said. "There is no change to the operational readiness or mission capability of the U.S. Armed Forces. Senior military leaders are able to remain fully mission capable and perform their duties from an alternative work location."

The Associated Press contributed to this report.