Metro spokesman Dan Stessel said riders should not expect “an announcement when we step down from the current level” of added security.
With July 4 less than three months away, Pavlik said law enforcement agencies and federal security officials will review security in handling large crowds.
“We’re going to make decisions based on the intelligence we have,” he said.
The transit agency is installing new security cameras at stations that will have the ability to record audio as well as video.
Sgt. Paul Brooks, spokesman for the U.S. Park Police, which patrols the Mall and handles many large public gatherings there, declined to give details about any extra steps the department might be taking.
“You can rest assured that we’re out there and maintaining diligent patrols along our areas of responsibility to include the monuments [and] memorials,” he said.
Officials who provide security for major events said they will enhance security for upcoming events, including the Verizon Center, which already searches bags and sweeps patrons with a metal-detecting wand.
In Richmond, Police Maj. Steve Drew said precautions will be taken at a NASCAR race coming up at the 94,000-seat Richmond International Speedway.
“We will learn from what happened in Boston,” Drew said. “I don’t think that there’s a law enforcement agency around this country that isn’t on a heightened awareness or heightened alert, reviewing . . . manpower, strategies [and] planning before big events.”
Baltimore police dispatched a team to Boston. “God forbid we have a similar occurrence locally, we want to make sure that we learn best practices that are occurring up there,” said Anthony Guglielmi, chief spokesman for the Baltimore police.
He said extra officers were being sent to transportation hubs and to Camden Yards, where the Orioles start a nine-game home stand Tuesday. “We’re going to be looking at any type of gathering that would attract a large group of people,” he said.
Baltimore police also are reviewing all upcoming special events, including a foot race this weekend, the Preakness horse race May 18 and the Baltimore Ten-Miler on June 15.
“There’s no credible threats to Baltimore,” Guglielmi said. “This is just some pro-active planning. This is in response to what’s happening up in Boston. This is to put people at ease. And it’s really to remind everyone . . . if you see something, say something.”
After Monday’s explosions, Ron went through the available videos frame by frame in stop action.
“Nobody really paid attention to what [the bomber] was doing, and that’s quite alarming,” he said. “I’m confident that the placement of those devices was done under the eyes of many people, possibly also under the eyes of the security personnel. When you look at most of the first responders prior to the explosions, they were all standing there and facing the runners.”
Mark Berman, Dana Hedgpeth, Peter Hermann and Rachel S. Karas contributed to this report.