Joe Torre, Major League Baseball's executive vice president of baseball operations, conferred with managers Terry Collins of the Mets and Ned Yost of the Royals during the delay, which occurred while Mike Moustakas was batting against Matt Harvey.
"Before the start of the bottom of the fourth inning of tonight's World Series Game 1, a rare electronics failure caused both the primary and backup generators inside the FOX Sports production compound to lose power," FOX said in a statement.
"The issue was immediately addressed, although it resulted in the audience missing one at-bat [a Kendrys Morales strikeout] during the time needed to switch to carriage of Major League Baseball's international feed, powered by a different generator on site. The on-field delay was due to replay capability being lost in both team's clubhouses."
Home-plate umpire Bill Welke called time after Collins appeared to raise an objection first, and Yost followed by asking for play to be halted. Viewers at home saw a graphic with the following message: "We are experiencing technical difficulties please stand by."
"We apologize for the interruption in tonight's coverage and are working to ensure that the remainder of the World Series is broadcast without incident," FOX said.
Bryan Hoch is a reporter for MLB.com. Follow him on Twitter @bryanhoch, on Facebook and read his MLBlog, Bombers Beat. Mark Newman is enterprise editor of MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.