Former PM Imran Khan Surrounded as Pakistan Cracks Down on Supporters

Imran Khan says Pakistani police surrounded his home in Lahore and his arrest is imminent.
Pakistan's government has demanded Khan turn over supporters involved in deadly riots within 24 hours or face a police raid.
Khan was briefly detained last week, sparking nationwide protests that killed at least eight people.
Pakistan says it will try civilians involved in the unrest in military courts, raising human rights concerns.
The political turmoil threatens to further destabilize Pakistan as it prepares for elections.