It was the first time the Moroccan government made such arrests.
The party was banned by the Moroccan government in 1969.
All trade and other economic activities are controlled by the Moroccan government.
"They didn't target a symbol of the Moroccan government," he added.
The Moroccan government made some efforts in preventing human trafficking over the last year.
Founded in 2002, the party was not recognised by the Moroccan government until the year 2005.
Boulhaut was closed in about 1963 and turned over to the Moroccan government.
The Moroccan government has thus far blocked such a referendum.
The party was banned in 2008 by the Moroccan government, but it is not dissolved yet.
It remains unclear how the Moroccan government will respond to the attack.