Early life and education
Imprisonment for political activity
He was arrested again on November 15, 2008, under the Suppression of Terrorism Act of 2008. At the funeral of Musa Dlamini, who died while supposedly trying to bomb the Lozitha bridge, Masuku is alleged to have verbally supported recent bombings of government institutions. He was acquitted and discharged at the High Court on September 21, 2009 after spending 340 days in prison.
On the 1st of May 2014 Masuku, after a making a speech at a May day rally in Manzini, was arrested together with student activist Maxwell Dlamini. They are charged with terrorism and sedition. An widely supported international campaign for their release was started shortly thereafter. 
- Caesar Zvayi (2007). "Zimbabwe: Welcome Home Son of McGee". The Herald via allAfrica. Retrieved 2007-11-28.
- "Standing up to Swaziland's king". BBC News. 2002-02-04. Retrieved 2007-11-28.
- Hager, Sarah (September 23, 2009). "Mario Masuku Acquitted in Swaziland". Amnesty International USA. Retrieved 2009-10-15.
- Nxumalo, Manqoba (September 22, 2009). "Mario Masuku a free man". Times of Swaziland. Retrieved 2009-10-15.
- Clottey, Peter (24 November 2008). "Swaziland's Opposition Leader Expected in Court Over Terrorism Charges". VOAnews.com (Voice of America). Retrieved 2009-10-15.
- Mario Masuku: 'A brief autobiography'
- Mario Masuku meets with senior Danish politician Mogens Lykketoft
- International campaign for the release of Mario Masuku
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