Pakistani authorities have placed shipping containers on key roads and highways leading to the capital and suspended cellphone service in Islamabad in an attempt to prevent supporters of imprisoned former Prime Minister Imran Khan from holding a rally seeking his release.

Authorities in Pakistan sealed off the capital, Islamabad, and blocked cellphone services on Friday to prevent an anti-government rally by supporters of jailed former Prime Minister Imran Khan, officials said.

The situation remained tense in Pakistan's capital on Sunday as jailed former prime minister Imran Khan's party vowed to continue its protest against the government, a day after violent clashes betwee