Robert Kyagulanyi, a 36-year old pop star and reggae musician turned legislator, is widely seen as posing a significant challenge to the Ugandan president.
The attack underscored the fragility of the latest peace push in the North African nation, which has been beset by turmoil since 2011.
French police arrested a man Monday following a high-speed car chase on the runway at Lyon airport after he rammed his car into a terminal and drove through the building.
Iraqi security sources said three Katyusha rockets fired by unknown assailants had hit the perimeter of the airport, although no damage or casualties had been reported.
The United Nations has brokered a ceasefire between groups that had been fighting for more than a week in the chaos-ridden oil producer's capital.
The airport in China's southern city of Shenzhen shut one of its runways for three hours after an emergency landing by a Capital Airlines flight.
A Yemeni rebel attack killed 12 soldiers south of the battleground Red Sea port city of Hodeida on Friday, military and medical sources said.
The jet was speeding down the Tribhuvan International Airport runway when the pilots detected a problem and aborted takeoff.
French anti-capitalist activists clashed with riot police at burning barricades Monday during a huge security operation to clear a rural protest camp at the site of an abandoned airport project.