Police detain Imran Khan supporters ahead of his rally

Police in Pakistan's capital detained dozens of supporters of cricketer-turned-politician Imran Khan late on Thursday, triggering brief clashes between police and opposition activists in various parts of Islamabad.

The arrests prompted Khan to announce a nationwide protest for Friday in Islamabad and elsewhere. Hours earlier, Pakistan banned all political meetings, rallies and protests in Islamabad — apparently in a pre-emptive move ahead of Khan's rally against Prime Minister Nawaz Sharif planned for next Wednesday.

The government says the ban, which applies to Islamabad and the adjacent garrison city of Rawalpindi, will remain in force for two months. Khan has...