United States Secretary of State Rex Tillerson has stated that the poisoning of ex-spy Sergei Skripal in Britain "clearly came from Russia" and it "certainly will trigger a response."
However, he said that he would not dwell upon what response might follow, according to a media report.
Tillerson spoke to reporters on his aircraft as he flew from Nigeria to Washington.
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.
The United States has expressed "outrage" over a nerve agent attack on a former spy and his daughter in an attempted murder in the United Kingdom allegedly by Russia. -- ANI, PTI