Imran Khan's party, the PTI, plans to challenge the federal takeover of Khyber Pakhtunkhwa in court, Al Jazeera reported. The party has governed the northwestern province since 2013.

On Sunday, President Asif Ali Zardari imposed emergency rule and governor's rule there, suspending the PTI government, Al Jazeera reported. Party spokesman Sheikh Waqas Akram told Al Jazeera that the challenge would be filed on Tuesday. He did not say which court would hear it. Dawn reported that PTI chairman Gohar Ali Khan said the party would go to the Peshawar High Court.

Sohail Afridi, the suspended chief minister, and some of his cabinet members are in preventive custody. "Yes, I can confirm that the chief minister and some of his cabinet members have been taken into preventive custody," Minister of State for Interior Tallal Chaudhry told Reuters, Dawn reported. A police official told Dawn that eight people were being held.

Afridi had been leading a march toward Islamabad to press for Khan's release, Al Jazeera said. Khan has been in jail for more than three years. "The long march has not ended. But a historic crackdown against the party has begun," Akram said.

The government says the province failed to lead the fight against armed groups. "No war can be won, however many resources you bring, whatever you do, until the government there leads it," Interior Minister Mohsin Naqvi said, according to Al Jazeera. A government white paper said 122 police were killed in the province in the first half of this year, up from 63 a year earlier.

The PTI rejects that charge. Gohar said Oct 11 would be remembered as a "black day" in the country's history, Dawn reported. Opposition leaders called on people to protest. Analysts who spoke to Al Jazeera were split on whether the move was about security or politics.

What we know: The federal government has taken over Khyber Pakhtunkhwa, and the PTI is going to court to fight it.
What we don't: Which court will hear the case, and how long the ousted leaders will be held.