A senior Palestinian official has been killed in a roadside bomb attack in Lebanon.Kamal Medhat, the deputy head of the Palestine Liberation Organisation in the country, died with at least three other people. A device exploded as his convoy passed. It had been hidden under a manhole cover in the road. It happened outside Sidon at the entrance to the Mieh Mieh refugee camp. Tensions have been high there and in a nearby Palestinian camp where Fatah and a range of Islamist factions compete for influence. Two people died in a gunbattle on Saturday. A former Fatah intelligence chief, Medhat was apparently trying to ease the situation. The PLO’s top representative in Lebanon was also reportedly visiting the camp but he was unhurt. Lebanon is home to 12 Palestinian camps housing more than 200,000 registered refugees. Palestinian President Mahmoud Abbas has condemned Medhat’s killing as an act of terrorism.