A joint team investigating the Defense Security Command’s(DSC) controversial martial law document is said to be looking into 15 military units described in the document as being tasked with executing martial law-related duties.

According to an official of the joint team of military and public prosecutors on Thursday, the team has been probing since last week figures who had commanded those 15 units or had served in the unit’s tactical duties.

The team is said to have focused its questioning on whether meetings were held to discuss executing martial law plans, and if the martial law document was actually delivered to the 15 units.

On Tuesday, the team raided the DSC's headquarters for the first time since its launch, as well as a research center and a unit under the command.