Foreign ministers from the Group of Seven industrialized nations are gathering Monday for a meeting given urgency by the chemical attack in Syria and the US military response, with participants aiming to pressure Russia to end its support for President Bashar Assad.
Last week's nerve gas attack in the rebel-held town of Khan Sheikhoun, which killed more than 80 people, stirred President Trump to strike for the first time at Mr. Assad's forces. US warships fired 59 cruise missiles at the Syrian air base from which the US believes the attack was launched.
US Secretary of State Rex Tillerson said Monday at the site of a World War II-era Nazi massacre in central Italy that the United States is rededicating itself to hold to account "any and all" who commit crimes against innocent people.
Secretary Tillerson accompanied Italian Foreign Minister Angelino Alfano to Santa'Anna di Stazzema, a site of Nazi atrocities where 560 civilians, including some 130 children, were killed during World War II.
Mr. Alfano said the massacre site was a reminder that "peace is not a given.... That is why we are here to work all together for peace and liberty."
Over the weekend, Alfano said that Europe's broad support for the US military strikes had contributed to a "renewed harmony" between the US and its partners ahead of the first meeting of G-7 foreign ministers since Donald Trump took office in January.
"We need to remember that not 10 years ago, but 100 or 120 days ago, the concern in Europe was that the United States and the EU were moving apart," Alfano told Sky TG24 Sunday. "I welcome this renewed harmony."
Officials are hoping that this can be leveraged to bring a new diplomatic push to end the six-year-old civil war in Syria.
The meeting in the Tuscan walled city of Lucca also brings German Foreign Minister Sigmar Gabriel, British Foreign Secretary Boris Johnson, and Japanese Foreign Minister Fumio Kishida, along with other G-7 foreign ministers, at a moment when the US is sending a Navy carrier strike group toward the Korean Peninsula to provide a physical presence following North Korea's persistent ballistic missile tests.
The meeting also comes amid an ongoing terror threat that was underscored by the deadly Palm Sunday bombing of Coptic churches in Egypt claimed by the Islamic State group, and another truck attack on European soil, this time in Stockholm, on Friday.
The US is fighting Islamic State group militants in Syria but had previously avoided striking government forces, largely out of concern about being pulled into a military conflict with Russia.
The chemical attack has sent a new chill through relations between the West and Moscow, which denies Syrian forces used chemical weapons.
Russia has plans to put forward a proposal on Monday for an independent and impartial investigation of the attack, said a spokesman in Berlin for the German Foreign Minister Sigmar Gabriel.
The spokesman, Martin Schaefer, said German viewed it as "a good and important sign."
Russia was kicked out of the club of industrialized nations, formerly the G-8, after its 2014 annexation of Ukraine's Crimea region and assistance for pro-Russian separatists in eastern Ukraine.
Britain's Johnson, who had been due to visit Russian counterpart Sergey Lavrov in Moscow ahead of Monday's G-7 meeting, canceled the trip at the last minute, saying the chemical attack had "changed the situation fundamentally."
He said that instead he would work with the US and other G-7 nations "to build coordinated international support for a cease-fire on the ground and an intensified political process."
Tillerson is scheduled travel to Russia after the G-7 gathering, and Johnson said he will deliver a "clear and coordinated message to the Russians."
Washington has sent mixed signals about whether it shares its allies' determination that Assad must be removed from power.
After the chemical attack, Mr. Trump said his attitude toward Assad "has changed very much" and Tillerson said "steps are underway" to organize a coalition to remove him from power.
In a round of television interviews that aired Sunday, though, Tillerson said the top U.S. priority in the region remains the defeat of Islamic State militants.
Alfano was cautious on the question of whether to push Assad out, saying that decision should be up to the Syrians.
"I have to say, the Libya experiment did not go well. We are still paying the price," Alfano said, referring to the lawlessness that has ensued since the killing of longtime dictator Moammar Gadhafi and the subsequent flow of migrants to Europe via Italy.
Colleen Barry in Milan and Frank Jordans in Berlin contributed to this report.