Google, Facebook, Twitter must combat Ukraine fake news - Polish, Baltic leaders

FILE PHOTO: Facebook, Google and Twitter logos are seen in this combination photo from Reuters files. REUTERS/

BRUSSELS (Reuters) -Alphabet unit Google and its subsidiary YouTube, Facebook and Twitter must do more to tackle disinformation related to Russia's invasion of Ukraine, the premiers of Poland, Lithuania, Latvia and Estonia said.

In a joint letter to the chief executives of the four companies dated Feb. 27, the four prime ministers criticised the U.S. tech giants, saying what they have done so far is inadequate.