Neighbour Maureen Cooper reported seeing police activity at Moazzam Begg's house in Hall Green from about seven o'clock.
She said a number of unmarked vehicles had arrived, one of which appeared to contain photographic equipment.
A small silver car and a green people carrier were taken away on low loaders, she said.
She also said Mr. Begg's wife had told her in a conversation last autumn that he had been abroad for "several months."
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It will be a dry and bright start, however scattered showers will develop.
Rather cloudy, with some rain likely at first.
It's believed there were around 8,000 people who laced up for this year's 10k race.