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LONDON – British government security ministers held an emergency meeting Saturday to discuss the poisoning of a Russian who spied for Britain as police backed by soldiers continued to search the town where he was attacked with a nerve agent.
Home Secretary Amber Rudd said after the meeting it was still "too early" to say with certainty who was behind the poisoning that left former Russian military intelligence agent Sergei Skripal and his daughter in critical condition.
Rudd said the investigation has been painstaking and involved more than 250 counter-terrorism officers. More than 240 pieces of evidence have been collected and 200 witnesses have been identified, she said.
The meeting was similar to the ones convened after extremist attacks and other threats to national security. It covered the latest police and intelligence reports from Salisbury, where the military-supported investigation has turned to the cemetery where the ex-spy's wife and son are buried.
Police are looking for clues to what sickened Skripal, 66, who in 2006 was convicted in Russia of spying for Britain, and his daughter, Yulia, 33. The father and daughter were found unconscious March 4 on a bench in Salisbury, a town 90 miles (140 kilometers) southwest of London.
A local restaurant and pub have been searched and remain closed to the public. Anti-contamination measures have been taken at places the father and daughter visited before they fell ill. Police in hazardous material gear also are collecting evidence from Skripal's house, as well as at the gravesites of Skripal's son and wife.
Skripal had his sentence cut short and was released from prison in 2010 as part of a spy swap. The former intelligence agent lived out of the public eye. in Salisbury
A friend of his daughter's, Irina Petrova, told The Associated Press that Yulia Skripal enjoyed England but preferred living in Moscow, where she made her primary home.
"She's not a typical Russian," Petrova said. "She was so easygoing. Even when something happened to her dad, she never spoke of any problems. And neither did her mother. They were so alike. Never did they speak of problems. Even in difficult times, they always had smiles and pleasant faces, not grumpy."
Petrova described Sergei Skripal as "a good, kind man" and said it was terrible that the "whole family disappeared in basically one instant."
Detective Sgt. Nick Bailey, who has been hospitalized since helping the Skripals, released a statement Saturday saying he was "merely doing his job" and does not consider himself a hero.
Bailey is recovering and is well enough to sit up and talk with his family, according to Rudd.
Police have not released details about the specific nerve agent used in the attack. One theory is that the Skripals were poisoned in his house before visiting a restaurant and a pub and becoming ill.
British officials say there is not a public health threat but some residents have become alarmed by the site of investigators wearing extensive hazardous material protection gear.
About 180 marines, soldiers and air force personnel with expertise in chemical weapons, decontamination and logistics have been called in to help with the probe and to remove vehicles that may have become contaminated.
Naira Davlashyan in Moscow contributed.