Yahoo is buying the mobile messaging app Blink.
Terms of the deal, which was announced on Wednesday on Blink's website, are not being disclosed.
Messages sent through the Blink app self-destruct after a certain amount of time.
The app allows users to send texts, sketches, record audio, make videos and take photos.
Blink will shut down both the iOS and Android versions of the app in the coming weeks before the switchover.
Yahoo, based in Sunnyvale, California, has bought numerous startups since the arrival of CEO Marissa Mayer two years ago as it tries to reverse declining revenue.
The deal follows Facebook's $US19 billion ($A20.56 billion) deal earlier this year for the messaging app WhatsApp.
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