Addressing a press conference, 24 hours after Pakistan plunged into darkness, Khan on Tuesday, however, said the "possibility of foreign intervention through the internet is low".
The blackout, which Energy Minister Khurram Dastagir claimed was caused by a power surge, is the second significant grid breakdown in three months and adds to the nearly daily blackouts Pakistan's population experiences.
According to Dawn newspaper, Rehman led month-long demonstrations in Gwadar and was wanted by the Gwadar police in several cases, including the murder of a policeman.
This statement came after the leader of the Opposition in the Sindh Assembly, Haleem Adil Sheikh filed a petition in court asking for proper security as he was reportedly under threat.