LUCCA, Italy (AP) — Foreign ministers from the Group of Seven industrialised nations met here Monday to try to forge a common response to the deadly chemical attack in Syria, with new sanctions against Russian backers of President Bashar Assad one of the options on the table.

G-7 diplomats sitting down for talks in the centuries-old Ducal Palace in Lucca, Italy, hope to use outrage over the attack and wide international support for the United States’ retaliatory missile strikes to push Russia to abandon Assad and join a new peace effort for Syria.

Members of the group also hope to gain a sense from US Secretary of State Rex Tillerson of President Donald Trump’s next steps and foreign-policy goals.

Speaking after meeting with Tillerson, British Foreign Secretary Boris Johnson said ministers “will be discussing the possibility of further sanctions, certainly, on some of the Syrian military figures and indeed on some of the Russian military figures”.

He said Russia had a choice: to continue backing the “toxic” Assad regime, “or to work with the rest of the world to find a solution for Syria, a political solution”.

Last week’s nerve gas attack in the rebel-held town of Khan Sheikhoun, which killed more than 80 people, stirred Trump — who was previously cool to the idea of US intervention — to strike for the first time at Assad’s forces. US warships fired 59 cruise missiles at the Syrian air base from which the US believes the attack was launched.

The US strikes drew support from other Western leaders who have been uncertain what to make of Trump’s foreign policy. Italian Foreign Minister Angelino Alfano said Sunday that Europe’s broad support for the US military strikes had contributed to a “renewed harmony” between the United States and its partners.

In a gesture weighted with symbolism, Tillerson visited the site of a World War II-era Nazi massacre in central Italy on Monday. He said the United States was rededicating itself to hold to account “any and all” who commit crimes against innocent people.

Tillerson accompanied Alfano to Santa’Anna di Stazzema, where 560 civilians, including some 130 children, were killed in 1944.

The two-day G-7 meeting in the Tuscan walled city of Lucca is bringing together the foreign ministers of France, Germany, Britain, Japan and Canada, the US and current G-7 president Italy, as well as European Union foreign policy chief Federica Mogherini.

Ahead of the full meeting, Tillerson held bilateral talks with G-7 counterparts including Britain’s Johnson, French Foreign Minister Jean-Marc Ayrault and Japanese Foreign Minister Fumio Kishida.