nerve agent

The 33-year-old daughter of Russian ex-spy Sergei Skripal, both of whom were poisoned by a rare nerve agent, also pushed back on public comments made by an outspoken cousin in Russia.

Yulia Skripal, who along with her father, Sergei Skripal, was being treated for exposure to a toxic nerve agent, has been discharged and taken to a "secure" location and has asked for privacy.

The Metropolitan Police says the highest concentration of the rare chemical was found on Sergei Skripal's front door in Salisbury, England. Investigators assure neighbors that they are safe.

At a summit in Brussels, EU leaders said "there is no plausible alternative explanation" for the poisoning of Sergei Skripal and his daughter earlier this month in southern England.

The policeman who responded to the scene of the nerve agent attack on a former spy was released Thursday, as another officer exposed to the deadly chemical was being treated for minor symptoms.