Dr Mumba was picked up from his residence after a search of possessing illegal firearm yielded no success.
The former MMD leader was accompanied to the police by his wife Florence and opposition UPND leader Hakainde Hichilema.
According to available information at the police, Dr Mumba allegedly forced his way to ZNBC Studio in Lusaka where he claims to have gone on Thursday 8th September to verify a news item that had ran on the 1900hrs news bulletin related to the on-going Presidential Petition court.
The UPND have accused President Edgar Lungu of displaying dictatorial tendecies through the arrest.
“This arrest is nothing but part of a wider clampdown on democratic freedoms which started with the closure of the privately owned Post newspaper, followed by Muvi TV, Komboni and Itezhi-Tezhi radio stations planned ahead of rigging the elections. It is part of a strategy to intimidate and shut the voices of the opposition and any dissenting voice following the controvertial August elections which are widely believed to have been won by the UPND,” said UPND official Garry Nkombo.