As investigators sought answers to what or who may have radicalized the suspects in the Boston Marathon bombings, leading U.S. senators said potentially important clues about at least one of the men might not have been widely shared within investigative circles months before the attack, reports the New York Times. After a law enforcement briefing, members of the Senate Intelligence Committee raised new questions about how the FBI and the Department of Homeland Security apparently handled information about Tamerlan Tsarnaev, 26, the suspect who was killed in a shootout with the police on Friday. “I'm very concerned that there still seem to be serious problems with sharing information, including critical investigative information,” said Sen. Susan Collins (R-ME), adding, “We still seem to have stovepipes that prevent information from being shared effectively, not only among agencies but also within the same agency, in one case.” Sen. Saxby Chambliss (R-GA) said, “We're going to continue to look at whether or not all the information was adequately shared and given to all the law enforcement agencies. If it wasn't, we've got to fix that.”