Social media and tech firms Facebook (FB) - Get Report , Twitter (TWTR) - Get Report , and Alphabet's Google (GOOGL) - Get Report are facing growing pressure from European Union authorities to alter their user terms in order to bring them more in line with EU law.

In June the European Commission and consumer protection authorities in the bloc wrote to all three companies urging them to improve their proposed changes to their user terms by the end of September, Reuters reports.

The regulators can issue fines if the companies don't comply.

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