The United States and Russia have laid bare their deep and unsafe divides on Syria and other matters, as U.S. secretary of state Rex Tillerson left an nearly two-hour meeting with Russian president Vladimir Putin with the sense the countries have reached a "low point" in relations.
Both Syria and Russian Federation have denied that forces loyal to the Assad regime carried out the toxic gas attack in the town of Khan Sheikhoun on 4 April.
Earlier, Mr Tillerson and Mr Lavrov met with Vladimir Putin to discuss a host of issues.
Speaking amid a backdrop of US investigations of Russian meddling in last year's presidential election, Lavrov also said Russia confirmed its willingness to dispel problems in relations with the U.S.
He stressed that Moscow was "open to dialogue with the United States in all different areas". In one small positive note, both sides said a working group at the foreign ministry level will be established, with hopes of improving ties. Lavrov also said Moscow was ready to revive an air safety agreement in Syria.
Mr Lavrov called for a United Nations investigation into the attacks in Syria beforehand but no agreement was reached with Washington during the two-hour talks.
"Our view is that the reign of the Assad family is coming to an end, and they have again, brought this on themselves", Tillerson said.
Mr Putin said he believed the United States would launch more missile strikes, and rebels were planning to stage chemical attacks to provoke more strikes. And he suggested that possible war crimes charges could be levied against the Syrian leader.
After the vote at the UN, French President Francois Hollande said Russian Federation "bears a heavy responsibility" for continuing to protect Assad and blocking a united global response.
He even pointed out that all the vacancies in the U.S. State Department make it hard to tell what's going on in the U.S. capital.
This was Mr Tillerson's first trip to Russian Federation as Secretary of State. Mr Putin had even granted Mr Tillerson a friendship honour. Tillerson spoke after meeting with Vladimir Putin, a meeting that occurred only after much uncertainty as to whether the Russian president would receive the secretary of state.
Two days after, the United States launched 59 cruise missiles against the Shairat military base in central Syria, where from, according to the USA, airplanes carrying chemical weapons took off.
Trump and others have indeed threatened similar action. "We have already seen all of this". "I think it's probably unlikely", he said.
He added: "Putin is the leader of Russian Federation".
Russia's Safronkov called the USA strikes on a Syrian air base in retaliation for the Khan Sheikhoun a provocation, but Delattre said they were "a legitimate response to a mass crime which could not go unpunished".
Mr Trump has voiced caution on his relationship with Mr Putin, and said he would wait and see about future ties with Moscow. And I think it's very bad for Russian Federation. "If you have any examples I'd be glad if you could share them with me".
Of Assad, Trump added: "This is an animal".
And Putin, who USA intelligence agencies say tried to help Trump get elected, insisted that relations with the US had only gone downhill since Trump took office in January.