Blues, who were relegated from the Premier League on Saturday, were due to travel to Africa in July for friendlies against Simba and Yanga.
BBC: Birmingham City pull plug on summer tour of Tanzania
2.
Lille's Mathieu Debuchy, Montpellier's Mapou Yanga-Mbiwa, Massadio Haidara from Nancy, Toulouse's Moussa Sissoko and Bordeaux's Yoann Gouffran all made the move to the north east of England.
CNN: A taxing time for French football?
3.
Yanga signed the Burundian international midfielder last season from Inter FC of Burundi and insist no formal transfer has been made for him to join the Tanzanian champions.
BBC: SPORT | Football | African | Caf suspends Simba player