WASHINGTON (AP/WVOC) - Security measures around the U.S. have been heightened following those explosions at the Boston Marathon on Monday.
Capitol Hill police say there is no known connection between the bombings and Washington but they warned Congress and their staffers to be vigilant.
A notice sent out to staff says the Capitol Police are stepping up their numbers in anticipation of more security checks and more suspicious packages reported over the coming days.
They also warned of tighter security at entryways, including more frequent K-9 inspections of visitors.
In South Carolina, agents with the State Law Enforcement Division have been in touch with Homeland Security officials.
SLED spokesman Thom Berry says what happened is another reminder to be on the lookout for suspicious activity and report it.
He says most of the heightened security is behind the scenes, but the public might notice additional precautions at military bases and upcoming sporting events.
Organizers of other big races, such as the Cooper River Bridge Run and the Carolina Marathon, say they'll adapt planning to take into account what happened in Boston.