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."
More top news
A largely mild, cloudy night with outbreaks of rain becoming more persistent from the northwest, perhaps turning heavy in places too.
It will be a largely mild, cloudy night with outbreaks of rain becoming more persistent from the northwest.
Birmingham City's parent company has appointed Carson Yeung's brother-in-law as its new chief executive and managing director.