The US embassy in Pakistan's capital, Islamabad, has become the latest target of protesters angry at an anti-Islam video that triggered protests in the Arab and Muslim world.
The total number of protesters reached around 5,000 later on Thursday with the arrival of protesters carrying the flags of hardline Islamist groups. At least 50 people were injured as police fired tear gas and live rounds towards the crowds.
Al Jazeera's Kamal Hyder, reporting from Islamabad, said the situation was eventually brought under "control" by police and the military.
"Police tried to control the crowd by firing in the air and using tear gas. But because of the size of the crowd, the police were forced to ask for help from the military," he said.