AdvertisementU.K. Prime Minister Says 'Highly Likely' Russia Responsible For Ex-Spy PoisoningMarch 12, 2018Merrit KennedyfacebookEmailMilitary forces continue investigations Monday into the nerve agent poisoning of Sergei Skripal and his daughter, Yulia. U.K. Prime Minister Theresa May says it is "highly likely" that it was carried out by Russia. (AP)