PARIS, April 21 -- European allies fear an inexperienced US negotiating team is pushing for a swift, headline-grabbing framework ‌deal with Iran that could entrench rather than resolve deeper problems, diplomats with past experience dealing with Tehran said.

They worry Washington, eager to claim a diplomatic win for President Donald Trump, could lock in a superficial agreement on Iran's nuclear programme and sanctions relief, then struggle through months or years of technically complex follow-on talks.

"The concern isn't that there won't be an agreement," said a senior European diplomat, one of eight who spoke to Reuters who have previously worked on the nuclear file or continue ‌to do so. "It's that there will be a bad init...