A team of 10 heavily armed officers descended on the MDC offices just before 8pm, and would not allow anyone to leave or enter the premises, the party said in a statement.
The police kept their vigil until Monday morning when they produced a search warrant. Details of the warrant said the officers were looking for "arms of war".
The basis of the search as outlined in the warrant was that: "There were reasonable grounds for believing that there is in possession, or under the control of the MDC Provincial Adminstrator, or upon or in MDC offices, a certain article or articles that is to say, arms of war, which are unlicensed, which it is on reasonable grounds, believed may afford evidence of the commission or suspected commission of an offence."
The raid comes barely a week after seven opposition activists were rounded up in the eastern border town of Mutare, accused of plotting to assassinate President Robert Mugabe.
A small cache of arms was discovered in the house of an arms dealer, which police wanted to link to the MDC. The case against six of the men collapsed in farcical circumstances when a judge ordered their release following a series of bust-ups between the prosecutors and security agents.....