Speaking to thousands of supporters in Islamabad at the end of a nearly 40-hour anti-government march, Khan announced he would not end his sit-in until Sharif resigns.
Meanwhile, Israel and Hamas are now observing a five-day temporary cease-fire in an attempt to allow indirect talks in Cairo to continue. The negotiations are meant to secure a substantive end to the month long Gaza war and draw up a roadmap for the coastal territory, which has been hard-hit in the fighting.
OneIndia brings to you news from across the world in pictures.
Syrian govt flushes out rebels
A man operates a bulldozer to clear debris created during battles between Syrian troops and rebels off a street in Mleiha, some 10 kilometers (6 miles) southeast of downtown Damascus, Syria.
Palestinians protest against Israeli army
Palestinian protesters hurl stones at Israeli soldiers during clashes, following a protest against the Israeli military action over Hamas in Gaza, in the West Bank city of Hebron.
Imran Khan demands Sharif's resignation
Pakistan's cricketer-turned-politician Imran Khan raises fists during an anti government rally in Islamabad, Pakistan.
Who's dumb and who's dumber?
A customized vehicle after the Mutt Cutts vehicle in the movie Dumb and Dumber drives along Woodward Avenue in Ferndale, Michigan, during the Dream Cruise.
Balloon festival in Maine
Balloons take to the skies from Simard Payne Memorial Park in Lewiston, Maine, during the launch of the 2014 Great Falls Balloon Festival.
Netherlands wins gold
Netherlands' Dafne Schippers crosses the line as she wins the gold medal in the women's 200m final during the European Athletics Championships in Zurich, Switzerland.
Synchronised water beauties
Members of the team from Switzerland perform during the team synchronized swimming free combination preliminary at the LEN Swimming European Championships in Berlin, Germany.
Bolt promotes 'Mano a Mano' challenge
Jamaican Usain Bolt, Olympic gold medalist, smiles during a press conference promoting the 'Mano a Mano' challenge, in Rio de Janeiro, Brazil.