The former head of Lesotho’s armed forces was arrested over unspecified offences committed during his four years in the job, police said.
Lieutenant General Tlali Kamoli was detained and questioned last Wednesday, police said, declining to go into further details.
A month ago another senior army officer was arrested over the killing of Kamoli’s successor and two other officers in an army barracks.
Members of the opposition said at the time the killings were part of a failed mutiny.
Kamoli left the job last December. “We don’t know how long he will remain in detention. This will be determined by the interrogation,” police spokesperson Inspector Mpiti Mopeli said.
The southern African nation has been beset by coups and periodic political violence since gaining independence in 1966. It has been on a political knife-edge since an attempted coup in 2014 and June national elections that failed to produce an outright winner.