Suspected Tamil Tiger rebels killed two Sri Lankan policemen and a soldier in mine ambushes on Wednesday, officials said, while diplomats feared that a recent lull in violence could be followed by a dramatic new attack. More than 700 people have died so far this year, over half of them civilians and almost all since early April. But in the first 10 days of July, truce monitors say they know of only 19 confirmed deaths — still too many, but a definite fall. Full Story