Harare - Zimbabwe's information ministry says it is investigating whether a newsletter published by Prime Minister Morgan Tsvangirai's office is legal.
The state Sunday Mail newspaper, a mouthpiece of President Robert Mugabe's party, says the four-page publication set Tsvangirai on a "collision course" with government colleagues.
The newsletter contains details of Tsvangirai's current trip to re-engage with Western nations after a decade of isolation for Zimbabwe. The Sunday Mail says Tsvangirai should first have reported to Cabinet colleagues.
Chief information secretary George Charamba is quoted as saying his department is "looking at what the law says".
Rivals Mugabe and Tsvangirai joined in a coalition government in February.
* AP