In a related development, police briefly attempted to seal the MQM headquarters but withdrew after party leaders intervened. However, party workers and leaders present at the site demanded a written order authorising the move. The violence erupted on Sunday when long-simmering differences between the Siddiqui and Kamal factions boiled over into violence at the party headquarters in Bahadurabad. According to party sources, workers of the Siddiqui group were holding a meeting at the centre when members of the Kamal faction arrived to hold their own gathering. A late-night press conference planned by the Siddiqui group was later postponed.