Israel's prime minister says he will press the case for "crippling sanctions" against Iran when he visits Russia this week.
Prime Minister Benjamin Netanyahu sets out on a three-day visit to Moscow later Sunday.
He'll be meeting with Russian leaders just days after Iran announced it would be enriching uranium to higher levels for medical purposes. That process could be used to build bombs if ramped up further.
Israel, the U.S. and much of the international community think Iran is out to build a bomb. Tehran denies that.
A Russian company is building Iran's first nuclear power plant, and Moscow traditionally has resisted new sanctions.
But senior Russian officials say the new enrichment plans show the suspicions about Iran's intentions are well-founded.
© Copyright 2015 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.