Because the couple fell ill in Salisbury, authorities were concerned they might have come into contact with the same poison that fell Skripal, a former Russian spy, his adult daughter in March and another British couple in June.
Fears that two people had become the latest victims of Novichok poisoning in Salisbury have been allayed after police said there was nothing to suggest the nerve agent had caused them to fall ill..
"They took it really seriously, none of us were hurt", she said, "I feel fine today".
At around 1.30am, having waited since about 6.45pm, Amanda said the diners were told further tests had shown it wasn't Novichok and they were allowed to go home, leaving their details with police. It was later discovered they had been exposed to the nerve agent Novichok.
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BBC south of England correspondent Duncan Kennedy said that Public Health England is aware of the incident but "there's no suggestion that this is connected to the Novichok incident back in March".
A fire engine, four police cars, an ambulance and an incident response unit were called to the scene.
Wiltshire Police said the 42-year-old man and 30-year-old woman, whose names were not released, remained in hospital under observation.
Of new incident in the British Salisbury police said, calling the incident a "medical incident". The nationality of the pair have not been confirmed by police.
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He said companies will be forced to choose between raising prices on goods or absorbing the hit to their profit margins. The tariffs are set to begin on September 24 with a levy of 10 percent, before ramping up to 25 percent on January 1.
Russia denies involvement, and a diplomatic confrontation over the case has led to sanctions and the expulsion of more than 150 Russian diplomats from two dozen Western countries.
"Rightly the emergency services start with a highly precautionary approach until they know otherwise".
The former Russian spy and his daughter survived the murder attempt, but an unconnected woman, Dawn Sturgess, died in July and her partner Charlie Rowley fell ill after Rowley found a perfume bottle containing the same nerve agent.
Police have linked the two incidents and have said Ms Sturgess was killed by the same chemical used in an alleged hit by Russian military intelligence officers on Mr Skripal.
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The men appeared in an interview on Kremlin-funded RT television station on September 13 to proclaim their innocence and said they were merely tourists in the city southwest of London.