“The incident took place at night and there were many people, so there is a possibility that more casualties could emerge,” he told Reuters.
A witness who was at the service, Peter Kilewo, told AFP news agency the scene was “horrible” and people were “trampled on mercilessly, jostling each other with elbows.”
Local media reported that Mr. Mwamposa flew to Dar es Salaam, a city on the Tanzanian coast, after the stampede to lead a prayer service at another branch of his church instead of attending to the injured.
Police said an investigation has been launched and added: “some churches are disturbing us.”
There has been a rise in the number of pastors who claim they can perform “miracle cures” and eradicate poverty in Africa in recent years.
Preachers who spread what they call the “prosperity gospel” have been involved in financial scams and money laundering schemes, as well as other stampedes.
Last year, three people were killed in a stampede at a church in Pretoria during a service led by Shepherd Bushiri.
Mr. Bushiri is Africa’s wealthiest preacher and was charged with money laundering and fraud in February last year after allegedly smuggling cases of money out of South Africa on his private jet.