German ex-spy chief arrested for treason: What we know

Former German spy chief August Hanning has been arrested on suspicion of treason.

Hanning, who led the Federal Intelligence Service from 1998 to 2005, is accused of passing secrets to the CIA.

The arrest comes as part of a long-running investigation into the activities of a German intelligence agent who spied for the US.

Hanning has not yet been charged and denies any wrongdoing.