Police in the Pakistani city of Karachi have used sticks to beat protesters on an anti-government protest march.
The demonstrators want President Asif Ali Zardari to fulfill a pledge to reinstate judges sacked under former President Pervez Musharraf.
The rally was one of a series planned across the country, ahead of a four-day march that organisers hope will culminate with a sit-in in the capital, Islamabad, on Monday.
The government says the march is aimed at destabilising the country, and a number of protesters in Karachi were arrested.
Despite the crackdown, many lawyers and activists boarded buses in Karachi bound for the capital, shouting slogans and cheering.
Hundreds more protesters took to the streets in the cities of Lahore and Quetta.
Security across the country remains tight, and tensions are high ahead of next week's planned sit-in.