The Nazi-hunting Simon Wiesenthal Center said Monday it had gleaned dozens of helpful tips from a poster campaign in Germany seeking information on the last living perpetrators of the Holocaust.

As he announced an expansion of the campaign to more German cities, its initiator, Efraim Zuroff, said four cases involving Nazi suspects in their 80s had been handed to state prosecutors for investigation based on information from the public since July.

Iranian negotiator Abbas Araqchi said "two or three" differences remain with the major powers as nuclear talks go into a fourth day in Geneva on Saturday, Fars news agency reported.

"We still have two or three points of difference. However, the two sides are getting close to an agreement," Araqchi told Fars shortly before the talks resumed.

U.S. lawmakers will launch a "goodwill" mission to Europe next week to smooth ties frayed by revelations of American espionage on Europeans allegedly including German Chancellor Angela Merkel.

Democratic Senator Chris Murphy and two members of the House of Representatives will visit Berlin on Monday and Brussels Tuesday to address the transatlantic partnership as well as concerns about National Security Agency surveillance activities.

Iran's chief negotiator warned Thursday of a lingering "lack of trust" and "major differences" at nuclear talks with world powers in Geneva, saying it was hampering progress over a deal.

Abbas Araqchi, a deputy foreign minister, said Iran would not sign up to an agreement on its controversial nuclear program unless the so-called P5+1 group accepts what Tehran considers its right to enrich uranium.

Iran's top decision-maker Ayatollah Ali Khamenei said Wednesday he will not allow any "retreat" on Tehran's nuclear rights, ahead of a new round of talks with world powers.

While expressing support for negotiators engaging in nuclear talks in Geneva today, the supreme leader said the Iranian team was instructed to respect Tehran's "red lines."

German Chancellor Angela Merkel called Monday for answers over "grave" U.S. spying accusations which she said were testing transatlantic ties, including fledgling trade talks.

Ahead of a special debate on snooping by U.S. intelligence on German soil which included the suspected tapping of her mobile phone, Merkel addressed the U.S. espionage claims at the start of a speech to parliament.

Germany's top parties, in talks on forming a government, agreed on Monday to a binding boardroom quota for women intended to fix a big gender imbalance in business.

Chancellor Angela Merkel's conservative Christian Democrats (CDU) and their likely coalition partners, the Social Democrats (SPD), said they planned to require listed companies to fill at least 30 percent of the seats on their supervisory boards with women from 2016.

Britain's electronic eavesdropping service keeps tabs on foreign diplomats by monitoring their hotel bookings, a German magazine reported Sunday citing leaks provided by former U.S. intelligence contractor Edward Snowden.

News weekly Der Spiegel said that for more than three years, the British Government Communications Headquarters (GCHQ) has had a system to watch reservations at at least 350 upscale hotels around the globe.

Patriarch of Antioch and All the East Youhanna X Yazigi called on Friday for the formation of a government in which all the rival parties are represented and stopping the emigration of Christians.

In remarks ahead of a trip to France and Germany, Yazigi stressed “the importance of forming an all-embracing cabinet so that we hold the presidential elections away from vacuum.”

Germany's Social Democrats flexed their muscles Wednesday ahead of a rank-and-file gathering as they wrangle with Chancellor Angela Merkel's conservatives over teaming up in government.

Nearly eight weeks after elections, Merkel is still locked in grueling negotiations with the SPD on forming a right-left coalition after her bloc's strong showing which nevertheless fell five seats short of a ruling majority.