Emergency services personnel stage outside Prezzo restaurant, Sunday, Sept. 16, 2018, in Salisbury, United Kingdom, where police have closed streets as a "precautionary measure" after two people were taken ill from the restaurant, amid heightened tensions after the Novichok poisonings earlier in the year. (Jonathan Brady/PA via AP)

Emergency services personnel stage outside Prezzo restaurant, Sunday, Sept. 16, 2018, in Salisbury, United Kingdom, where police have closed streets as a "precautionary measure" after two people were taken ill from the restaurant, amid heightened tensions after the Novichok poisonings earlier in the year. (Jonathan Brady/PA via AP)

LONDON (AP) — Police closed roads and called a hazardous response team Sunday night after two people became ill at a restaurant in the English city where a Russian ex-spy and his daughter were poisoned with a chemical nerve agent.

Wiltshire Police described the emergency steps taken in response to “a medical incident” in Salisbury as a precaution. Authorities later lifted the alert and said no evidence of the nerve agent Novichok involved in the earlier case was found when the two ill people were examined at a hospital.

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Salisbury spent months with quarantine tents and investigators in full-body protective gear combing for evidence after Sergei Skripal and his adult daughter were found unconscious on a bench in March.

Its residents were put back on edge in June when a man and a woman living in a nearby town were hospitalized with signs of exposure to the same Soviet-made Novichok. The woman, 44-year-old Dawn Sturgess, died.

Britain’s counter-terrorism police said this month they think Sturgess’ boyfriend found a counterfeit perfume bottle containing remnants of the substance originally applied on the front door of Skripals home in Salisbury.

The man and woman who got sick at the Prezzo restaurant in Salisbury remained in the hospital under observation but “we can now confirm that there is nothing to suggest that Novicho” was involved, Wiltshire Police said in a statement.

“A cordon will remain in place around Prezzo at this time as part of ongoing routine enquiries. All other areas that were cordoned off will now be reopened,” the statement added.

British prosecutors have charged two Russian men in absentia with poisoning Sergei Skripal and his daughter, Yulia. They have alleged Alexander Petrov and Ruslan Boshirov were Russian intelligence agents, which they and Moscow have denied.