By Dominic Evans BEIRUT (Reuters) - Syria's opposition and the government of President Bashar al-Assad seem to be preparing to take part in an international peace conference against a background of some of the worst fighting this year. On Tuesday, Lebanese Hezbollah fighters and Syrian soldiers, backed by air strikes and artillery, renewed an offensive aimed at driving Syrian rebels from the town of Qusair near the Lebanese border, opposition activists said. ...

By Marcus George DUBAI (Reuters) - Iranian authorities barred two potentially powerful and disruptive candidates from running in next month's presidential election on Tuesday, ensuring a contest largely among hardliners loyal to the clerical supreme leader. Akbar Hashemi Rafsanjani, a veteran companion of the Islamic Republic's founder, a former president and thought potentially sympathetic to reform, was denied a place on the ballot by the Guardian Council of clerics and jurists, state media said. ...

By Kareem Raheem BAGHDAD, Iraq (Reuters) - A series of bomb and gun attacks across Iraq killed more than 40 people on Tuesday, a day after over 70 died in violence targeting majority Shi'ites that has stoked fears of all-out sectarian war with minority Sunnis. Nearly 300 people have been killed in the past week as sectarian tensions, fuelled by the civil war in neighboring Syria, threaten to plunge Iraq back into communal bloodletting. Ten years after the U.S. ...

By Mike McDonald GUATEMALA CITY (Reuters) - The trial of former Guatemalan dictator Efrain Rios Montt has likely collapsed after the country's top court struck down his conviction for genocide, defense and prosecution lawyers said on Tuesday. Rios Montt was sentenced on May 10 to 80 years in prison for genocide and crimes against humanity, a conviction hailed as a landmark for justice in the Central American nation where as many as 250,000 people were killed in a 1960-1996 civil war. ...