Syrian general and brother to the president Rifaat al-Assad reportedly boasted of killing 38,000 people. Amnesty International initially estimated the death toll was between 10,000 and 25,000. Reports by Syrian Human Rights Committee claimed "over 25,000" or between 30,000 and 40,000 people were killed. Twenty years later, Syrian journalist Subhi Hadidi, wrote that forces "under the command of General Ali Haydar, besieged the city for 27 days, bombarding it with heavy artillery and tank [fire], before invading it and killing 30,000 or 40,000 of the city's citizens – in addition to the 15,000 missing who have not been found to this day, and the 100,000 expelled." After the Hama uprising, the Islamist insurrection was broken, and the Brotherhood has since operated in exile while other factions surrendered or slipped into hiding. Government attitudes in Syria hardened considerably during the uprising, and Assad would rely more on repression than on political tactics for the remainder of his rule, although an economic liberalization began in the 1990s. After the massacre, the already evident disarray in the insurgents' ranks increased, and the rebel factions experienced acrimonious internal splits. Particularly damaging to their cause was the deterrent effect of the massacre, as well as the realization that no Sunni uprisings had occurred in the rest of the country in support of the Hama rebels. Most members of the rebel groups fled the country or remained in exile, mainly in Iran, while others would make their way to the United States, the United Kingdom and Germany. The Muslim Brotherhood—the largest opposition group—split into two factions, after giving up on armed struggle. One, more moderate and recognized by the international Muslim Brotherhood, eventually headquartered itself in the UK where it remains, while another for several years retained a military structure in Iran, with backing from the government, before rejoining the London-based mainstream. The Hama massacre is often raised in indictment of the al-Assad government's poor human rights record. Within Syria, mention of the massacre has been strictly suppressed, although the general contours of the events—and various partisan versions, on all sides—are well known throughout the country. When the massacre is publicly referenced, it is only as the "events" or "incident" at Hama.