Worries about a confrontation between Russia, Syria's big ally, and the West have been running high since Trump said on Wednesday missiles "will be coming" in response to the attack in the Syrian town of Douma on April 7, and lambasted Moscow for standing by Syrian President Bashar al-Assad. Pierce said she wanted "to state categorically ... that Britain has no involvement and would never have any involvement in the use of a chemical weapon".
The sabre-rattling over an alleged chemical attack in Douma, outside Damascus, reached a new peak this week as US President Donald Trump warned of striking Syria with "smart" missiles and Russian Federation vowed to shoot them out of the sky.
"The immediate priority is to avert the danger of war", said Moscow's United Nations ambassador Vassily Nebenzia on Thursday.
Sanders added that US officials are "continuing to assess intelligence" and are "engaged in conversations with our partners and allies".
He added that if the leaked targets and scope is accurate, then "it is unlikely that it will make much of a difference, in terms of the direction of the conflict and, importantly, in the Assad regime efforts to reconstitute his chemical weapons program".
Putin's Russian Federation has stood in the way of all attempts to hold Assad accountable for his crimes, including just two days ago when it blocked a United Nations resolution that would have created an independent investigation into chemical weapons usage in Syria.
They agreed to "keep working closely" on the issue, Mrs May's office said in a statement.
On Thursday, US officials were quoted as saying that samples from victims had tested positive for chlorine and a nerve agent.
On Thursday afternoon, Mr Trump held extensive talks on Syria in a meeting that included his defense secretary James Mattis, joint chief of staffs Joseph Dunford, director of national intelligence Daniel Coates, ambassador to the UN Nikki Haley, new national security adviser John Bolton and others.
Should the west initiate an attack on Syria, following allegations the Assad Regime was behind the poison attack in Douma over the weekend, you won't hear any complaints from Denmark.
According to The Guardian, the US, UK and France are already making plans for strikes in Syria that are "intended to punish" the Assad regime following a suspected chemical weapons attack on civilians. In it every member of May's team is said to have spoken.
This Iranian analyst went on to say that in general, it seems the two sides are trying to have the situation under control.
Labour leader Jeremy Corbyn insisted that MPs were entitled to a vote, saying Parliament "must be consulted".
Jeremy Corbyn, as well as Conservative backbenchers, has demanded any military action require parliamentary approval.
A fact-finding mission from the Organization for the Prohibition of Chemical Weapons is expected to arrive in Douma on Saturday.
On Friday campaigners from the Stop the War Coalition will hand in a letter signed by MPs, trade unionists, celebrities and academics to Downing Street urging Mrs May to not take military action in Syria.