The DMK-led Secular Progressive Alliance parties staged a massive protest in Coimbatore on Friday condemning the ‘undemocratic arrest’ of Minister V Senthil Balaji, ‘autocratic act’ of Governor RN Ravi and BJP’s misuse of central agencies to fulfill its political agenda. DMK MP T R Baalu, TNCC chief Alagiri, VCK chief Thol Thirumavalavan, MDMK leader Vaiko among others took part. Dravidar Kazhagam president K Veeramani and Manithaneya Makkal Katchi leader MH Jawahirullah were among those others who spoke.