The prison guards blindfold and handcuff the inmates and keep them in that position for the whole day, and while lying them on the ground, they start beating them as well as insulting them, Ali al-Mashima told FNA on Sunday.
He said security forces and prison guards use different torturing techniques, such as electric shock and pouring cold water on them in humid and dark prison cells and then keeping them in front of a cooler and in freezing conditions, not just to take confessions, but to humiliate the revolutionary leaders and opposition figures to wear off their resolve and determination.
In August 2011, al-Mashima said that various torturing techniques are used in the al-Khalifa prisons to extract information and punish the revolutionary forces, and revealed that Bahrain's prince has a direct role in the torturing and interrogation of the detainees.
"Nasser, the son of the Bahraini king is involved in the torturing of the detainees and this has been revealed and proved to us," Ali al-Mashima' told FNA at the time.
He also reiterated that Sheikh Mohammad al-Meghdad and Sheikh al-Mahrous, two of the opposition leaders, have confirmed the presence of Nasser al-Khalifa in the process of their interrogation and torturing.
Anti-government protesters have been holding peaceful demonstrations across Bahrain since mid-February 2011, calling for an end to the al-Khalifa dynasty's over-40-year rule, end of discrimination, establishment of justice and a democratically-elected government as well as freedom of detained protesters.
Violence against the defenseless people escalated after a Saudi-led conglomerate of police, security and military forces from the Persian Gulf Cooperation Council (PGCC) member states - Saudi Arabia, Kuwait, the United Arab Emirates, Oman and Qatar - were dispatched to the tiny Persian Gulf kingdom on March 13, 2011, to help Manama crack down on peaceful protestors.
So far, tens of people have been killed, hundreds have gone missing and thousands of others have been injured.