Theresa May's offer to give EU citizens in the UK "settled status" after Brexit has been described as being "far short of what citizens are entitled to".
It offers Europeans in the UK fewer rights than Britons in the EU, MEPs say in a joint letter to newspapers.
Cabinet Office minister Damian Green said the "basic rights" of EU citizens living in the UK would be "preserved"
EU migrants who had lived in the UK for five years would be granted access to health, education and other benefits.
The leaders of the four political groups who have signed the joint letter said the UK proposal "falls short" because it would take away rights citizens currently have, and create new red tape and uncertainty for millions of people. They would not endorse anything that removed rights already acquired by citizens.
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