Radiation discovered at Arsenal

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Tiny traces of radiation have been detected at Arsenal's Emirates stadium.

It was found during the investigation into the death of former Russian spy Alexander Litvinenko, who had been poisoned with radioactive Polonium-210.

A Health Protection Agency (HPA) spokesman said "barely detectable levels" of radiation had been found at the north London venue.

She said there was no health concern, adding the levels picked up were lower than natural background activity.

British police launched their investigation after Mr Litvinenko, 43, died in a London hospital on 23 November.

Tests carried out

Tests have been carried out at a number of places the ex-spy visited in London on November 1 - the day he fell ill.

A hotel and an office are the latest central London locations to be tested for signs of the deadly toxin found in the ex-KGB agent's body.

A room at the British Embassy in Moscow is also being tested as a precaution.

So far more than 3,000 people in the UK have called the NHS Direct line since the radiation scare, with 179 being followed up for further investigation, the HPA said.

The Emirates stadium opened this summer.