The headqaurters for opposition UPND in Lusaka was by 17 hours local time on Monday surrounded by heavily armed police officers.
Police told the Watchdog that the police were looking for seditious materials.
But police sources also say there was a plot to plant the documents at the oppoistion party secretariat during the same operation. The police were said to have a search warranty.
After hours of hovering over the UPND headquarters, the police failed to gain entrance as UPND supporters stood on the entrance as Layer Sakwiba Sikota scrutinized the search warranty.
Sakwiba later told the police that their warranty was defective and asked them to leave.
Sikota was in the company of by UPND vice president Richard Kapita and special advisor to Hakainde Hichilema, Douglas Siakalima and other lawyers.
But police sources later told the Watchdog that the Police are likely to raid UPND Hichilema ‘s house and other party leaders and sympathizers in the night.
Last time Police attempted to charge the UPND leader with treason, but changed when they realized there was no merit and ended up charging him publishing false information.
The case is currently in the courts of law.