The average 30-year, fixed-rate home loan rose to 7.28 percent, up from 6.34 percent a year ago. More buyers are now turning to adjustable-rate mortgages.

Their accounts, detailed in hundreds of pages of investigative files obtained by The New York Times, were disjointed. All the men denied any wrongdoing.

British counterterrorism police said a 27-year-old British-Iranian dual national was arrested on Thursday. British officials have said they believe Iran played a part in planning the incident at R.A.F. Fairford.