LONDON, June 23 (Reuters) - The U.S. has started waiving some sanctions on Iran under their interim deal to end the war, but fully unravelling a tangled web of restrictions on the country's activities and trade under any more comprehensive agreement will be much harder.

An Iranian businessman has been convicted in federal court in Boston, Mass. , after a 14-day jury trial for charges related to violating U.

Both sides face pressure points that could make a protracted war painful.

The U.S. issued a sweeping rollback of sanctions on Iranian oil, offering Tehran an economic lifeline as negotiations toward a peace deal proceed.

The United States on Wednesday released the official text of the memorandum of understanding reached over the weekend with Iran.

A Massachusetts man has been found guilty of conspiring to unlawfully export electronic components to Iran, violating U.S. sanctions.

The agreement came after more than three months of stop-start negotiations and bouts of fighting since late February, roiling global energy and commodities markets.

A gold trader who admitted conspiring with a Turkish bank to help Iran evade U.S. sanctions has been sentenced to time served.

The Pentagon said a service member was killed in northern Iraq on Saturday while troops disposed of an Iranian drone. It also said “unidentified remains” had been found in Jordan, where an earlier attack had left two soldiers dead and another missing.