Days after President Trump ordered missile strikes against a Syrian air base, the apparent differences of opinion appear to highlight how little we know about whehter Trump is really going to be changing the USA policy toward Syria.

Trump acts decisively in Syria: Now what?

But the USA missile attack is expected to loom over Secretary of State Rex Tillerson's visit to Moscow next week. Earlier, U.S. military officials had said they were looking into whether Russian Federation participated, possibly by using a drone to help eliminate evidence afterward.

He said sanctions could target "figures who have been involved in coordinating the Syrian military efforts and are thereby contaminated by the appalling behavior of [Assad's] regime".

The gathering in the Italian city of Lucca, which begins at 1430 GMT, groups foreign ministers from the U.S. and Britain, Canada, France, Germany, Italy and Japan.

Britain to demand "very punitive sanctions" on Russian Federation at a G7 foreign ministers meeting.

The alleged chemical air strike by Assad's forces on April 4 killed more than 80 people in the rebel-held town of Khan Sheikhun in Idlib Province, triggering global outrage. He did not rule out additional strikes if Assad continued to engage in atrocities against rebel forces with either chemical or conventional weapons.

The assertion is rejected by the United States and others.

In response, President Donald Trump then signed off on firing 59 Tomahawk missiles at a Syrian air base Thursday. And Haley, too, said Washington's priority was "no longer to sit and focus on getting Assad out".

By 51 to 40 percent, more support than oppose the missile strikes launched early Friday on the Shayrat air base in Syria, with opinions dividing sharply along partisan lines.

But the secretary of state said when he meets with the Russian foreign minister this week, he will bring up Russia's obligation under a 2013 agreement to ensure the Syrian government got rid of its chemical weapons.

The Carl Vinson Strike Group was making a port call in Singapore and was scheduled to sail for Australia when the U.S. Pacific Command ordered the ships to sail north instead.

"If China is not going to solve North Korea, we will", Trump told The Financial Times on April 2.

Earlier on Sunday, Rep. Adam Schiff of California, the top Democrat on the House Intelligence Committee, said on ABC News' "This Week" that Russian Federation is "complicit" in the chemical attack in Syria. Russian Federation and USA are considered as the top most superpowers in the world, if the conflict gets worse their relationship will plunge and might even turn into a war. It was also unclear on Saturday morning where the strikes had been launched from. Where did it come from?

"[Russian President Vladimir Putin] views the USA strikes on Syria as aggression against a sovereign state in violation of the norms of worldwide law and on a made-up pretext.", said Dmitry Peskov, a Kremlin spokesman, according to the Independent.

Russian President Vladimir Putin denounced the U.S. strike as "act of aggression" and said it violated worldwide law. "I suspect you'll see more of him as he grows more comfortable in dealing with the press and in his relationship with the president and the administration's national security team", Cohen said.

The leaders of Spain, France, Italy, Portugal, Greece, Cyprus, and Malta issued the statement at the end of a summit in Spain.

Nor would it say whether the U.S. believed Assad should step down after the chemical attack on Khan Sheikhoun that killed at least 80 people and injured dozens more on Tuesday.