Thousands of people thronged the streets of Karachi on Saturday in the latest protest against a US-made anti-Islam film, police and witnesses said. The protesters, who included activists from the hardline 'Sunni Tehreek', wore green and white headbands as they marched through the city's main M.A. Jinnah road while some trampled on the American flag. They chanted slogans including "Hang the American film maker" and "We are ready to sacrifice our lives for the honour of Prophet Mohammad (PBUH)". "We strongly condemn this anti-Islam movie, it is a criminal act," Mufti Muneeb-ur-Rehman, a prominent religious leader told the rally, and called for a global ban on insulting "all prophets and messengers". Shafiq Ahmad, a senior police officer in Karachi, said there were "at least 15,000" protesters while rally organisers claimed "millions of people" participated. Police beefed up security before the rally, while paramilitary forces were also deployed.