The New York Times and Washington Post learned of a secret US raid on Venezuela soon before it was scheduled to begin Friday night — but held off publishing what they knew to avoid endangering US troops, two people familiar with the communications between the administration and the news organizations said.

The decisions in the New York and Washington newsrooms to maintain official secrecy is in keeping with longstanding American journalistic traditions — even at a moment of unprecedented mutual hostility between the American president and a legacy media that continues to dominate national security reporting. And it offers a rare glimpse at a thread of contact and even cooperation over some of the highest-stakes American national security issues.

The New York Times withheld some details in advance about the US Bay of Pigs invasion, and for months delayed a story on national security administration warrantless wiretapping during the Bush administration after White House officials said the story’s publication would endanger American lives.