"Extra! Extra! Read all about it!"
Years ago whenever there was breaking news and the normal daily had already been delivered, they would sometimes print a second paper delivered later in the day with the urgent news - An 'EXTRA' edition.
This was long before television, and even radio, made it easier to disseminate news. The Newsies (paper boys) would stand on the streets calling the chant, "Extra! Extra! Read all about it!"
Over time slang has dropped the e, and people still use the "Xtra, xtra!" exclamation to capture attention.
For a fun movie try Newsies. A young Christian Bale, Bill Pullmn, and Robert Duvall star in this 1992 musical based on the New York City newsboy strike of 1899. When young newspaper sellers are exploited beyond reason by their bosses they set out to enact change and are met by the ruthlessness of big business.