Trump told reporters that he believes that there should be some response to this as soon as they have all the facts.
"Yeah (there should be a response), as soon as we get the facts straight. And we're going to be speaking with the British today. We're speaking with Theresa May today. And as soon as we get the facts straight, if we agree with them, we will condemn Russia or whoever it may be," Trump said in response to a question.
"It sounds to me like they believe it was Russia and I would certainly take that finding as fact," Trump said.
Former Russian spy Sergei Skripal, 66, and his daughter Yulia, 33, were found collapsed after being poisoned last week. Both remain in a serious condition along with a police officer who came in contact with the same substance.
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Speaking before the House of Commons, May yesterday said it was "highly likely" that Russia was behind the nerve agent attack on Skripal who was once an informant for Britain's foreign intelligence service.
"We are standing with our UK ally," White House Press Secretary Sarah Sanders told reporters.
Sanders said the United States has been monitoring the incident closely and takes it very seriously.
"The use of a highly lethal nerve agent against UK citizens on UK soil is an outrage," she said.
"The attack was reckless, indiscriminate, and irresponsible. We offer the fullest condemnation, and we extend our sympathy to the victims and their families, and our support to the UK government. We stand by our closest ally and the special relationship that we have," Sanders said.