DANNEMORA, N.Y. — Authorities searching for two escaped killers who have been on the loose for the better part of a week acknowledged being in the dark about their whereabouts or doings, even as the hunt for the men expanded past state borders into Vermont. At a news conference outside the maximum-security prison on Wednesday, New York State Police Superintendent Joseph D’Amico said, “I have no information on where they are or what they’re doing, to be honest with you.” But authorities expanded the search after investigators learned that the inmates had talked before last weekend’s breakout about going to neighboring Vermont. “We have information that suggests they thought New York was going to be hot.