Chadian Opposition Leader Killed Amid Tensions Before Presidential Vote
• Chadian opposition leader Yaya Dillo killed during exchange of gunfire with security forces in capital • Clashes erupted after Dillo allegedly led attack on National State Security Agency building • Violence comes ahead of May 6 presidential election in Chad • Dillo seen as strong challenger to current president Mahamat Idriss Deby Itno • Tensions high in N'Djamena with heavy security presence after days of gun battles