The cabinet minister's intervention comes as the West unleashes a new diplomatic drive on the back of the retaliatory missile strikes launched by Donald Trump's USA administration.
US President Donald Trump ordered a surprise airstrike of cruise missiles on a Syrian airfield last week in retaliation for the attack on the rebel-held Syrian town of Khan Sheikhoun.
U.S. Ambassador to the United Nations and U.N. Security Council president Nikki Haley listens during a U.N. Security Council meeting on Syria, at the U.N. headquarters in NY on April 7.
"A one-time deal is not going to be productive".
"We have information from our partners and from contacts on that ground that makes it very plausible that the Assad regime was behind this disgusting poison gas attack", he said.
Bashar Assad dismisses Syria chemical attack as '100% fabrication'
Russian Federation is a steadfast backer of the Syrian government amid that country's bloody 6-year civil war. They were there", he said Wednesday.
Reluctant to put significant troops on the ground in Syria, the US for years has struggled to prevent Assad from strengthening his hold on power.
The U.S. military carried out air strikes against the forces of Syrian President Bashar al-Assad on Thursday.
Syria's Foreign Ministry condemned the USA strike as "a flagrant aggression" against the country and said Washington's real objective was to "weaken the strength of the Syrian army in confronting terrorist groups".
"Here's what I think Assad's telling Trump by flying from this base: FU", said Sen.
Sen. Lindsey Graham on Sunday took perhaps the most aggressive Washington stance on the country's simultaneous effort to defeat ISIS and solve the Syrian crisis - calling for more US troops in the terror fight and suggesting President Trump already has broad authority to order missile strikes on Syria.
US vows to keep up pressure on Syria after missile strikes
Tillerson said Xi agreed with Trump that North Korea's nuclear advances had reached a "very serious stage". Liu focused instead on the need for a political solution to the six-year Syrian conflict.
But the regime has denied any responsibility, saying its air strikes hit a rebel depot containing chemical materials.
Turkey remains committed to a ceasefire in Syria, but Russian Federation must stop insisting that Bashar al-Assad should remain in office, Turkish Foreign Minister Mevlut Cavusoglu said on Sunday.
He argued it would be best for US Secretary of State Rex Tillerson to deliver a "clear and coordinated message" to the Russians during his own visit to Moscow later in the week.
But he also backed calls for an independent inquiry into the suspected chemical weapons attack.
The US air strikes are likely to lead to global instability. Russian President Vladimir Putin and Iran's Hassan Rouhani said in a phone call that aggressive USA actions against Syria were not permissible and violated global law, the Kremlin said on Sunday.
EU Council Chief: Brexit Talks to Prove Difficult, 'Confrontational
But she also reiterated her warning that failure to reach a trade deal would hamper security ties. The EU wants to wait until exit terms are finalised before starting trade talks.