0228 GMT August 19, 2018
Wednesday's protest, involving hundreds of supporters, came hours after the caretaker government said it would try to transfer power on August 14, when nation celebrates Independence Day. Imran Khan, a former cricket star whose party won the most votes, is expected to be the next prime minister, AP wrote.
Khan's opponents say the military intervened in the July 25 elections on his behalf, allegations denied by the army. Khan has vowed to investigate the charges.
A European Union team that monitored the balloting has said the election results were largely credible.