Police raided the home of Thabani Mpofu, confiscating laptops and mobile phones, sources, whose names were not reported, told NewsDay Zimbabwe.
Tsvangirai's chief adviser Alex Magaisa, alerted Mpofu's lawyer, Beatrice Mtetwa to the raid, at which point she came to the scene, asking police for a search warrant, the sources said.
Police did not provide Mtetwa with a search warrant or an inventory of the items they confiscated, NewsDay reported.
Officers then accused Mtetwa of using her mobile phone to take photographs and record conversations between her and police. There was a scuffle when Mtetwa refused to hand over the phone and police arrested her for obstructing the course of justice, NewsDay reported.
Mpofu was also arrested, though his charges were not reported.
Police also arrested Anna Muzvidziwa and Felix Matsinde, both of whom work in Tsvangirai's communications offices. The reasons for the arrests were not given.
Exploding whale video goes viral on Internet
Jordana Brewster on Paul Walker: 'He was an enormous presence in my life'