Angolan prosecutors have seized assets belonging to two of former president José Eduardo dos Santos’s closest aides, the latest step in a crackdown on corruption in the southern African country.

Assets including a brewery and a vehicle assembly plant held by Gen Manuel Helder Vieira Dias, known as Kopelipa, and Leopoldino do Nascimento, known as Dino, were taken, Angola’s prosecutor’s office said in an e-mailed statement on Wednesday...