A four-judge bench of the Lahore high court headed by Chief Justice Umar Ata Bandial issued the direction after hearing arguments by the government's lawyer, Waseem Sajjad, who argued that the court had not passed any formal order to bar Zardari from holding the two offices of President and co-chairman of the PPP.
Of those released, 371 are fishermen and 64 other civilian prisoners.
Pakistan's squad for the 12th hockey World Cup in New Delhi.
Summary of sports events and persons who made news on Tuesday
India's majoritarian regime is now making a dangerously fast-paced move towards theocracy, like its western counterpart did a few decades ago, warns Mohammad Sajjad.
A total of 123 candidates, including seven ministers of Congress-National Conference coalition, eight former ministers and legislators are in fray for the Jammu and Kashmir's first phase of elections scheduled later this month.