In the aftermath of the explosions, many of the city's transportation systems have shut down or limited service.
Marathon Monday is a major holiday in Boston, and many public transportation services were already operating on alternate schedules.
In a press conference earlier this afternoon, the Boston Fire Department recommended that people stay home, and that those staying in hotels should return to their hotels.
At the request of law enforcement, the FAA placed a temporary flight restriction over a portion of the city, barring aircraft within a three nautical mile radius, up to an altitude of 3,000 feet. That zone has since been reduced to a two natuical mile radius.
The FAA also briefly put a ground stop in place, halting flights into and out of Boston's Logan Airport, so it could chance the runway configuration. Flights have since resumed, it said in a statement.
According to Boston Globe reporter Katie Johnson, the new runway configuration will allow planes to avoid the area over Copley Square, the site of two explosions.
Logan Airport confirmed on Twitter that flights are departing and arriving, and advised travelers to check with their airlines for delays or flight changes.
According to the Mass. Department of Transit's (DOT) Twitter page, several sections of Boston highways are closed, including Boston I-90 East exit 22 to Copley Sq and Huntington Av., and Wellesley Rte-128/I-95 exit 21.
As of 5:46 p.m. EST, service on the Green, Orance, and Red lines was resuming with "significant residual delays," according to the MBTA. Green Line service had been temporarily terminated earlier in the afternoon.
Park Street and Downtown Crossing had also reopened as of 5:46 PM, according to the MBTA.
We've also heard reports that people at North Station are being stopped and checked. Jim Lokay, a reporter with WCVB tweeted that trains were being stopped and people being searched:April 15, 2013
Amtrak trains are operating normally following the explosions, and the Amtrak Police Department is stepping up patrols and conducting increased sweeps of stations and track right-of-ways, the operator said in a statement.
More From Business Insider
- FAA Orders Inspection Of 1,000 Boeing Jets With Potentially Faulty Tail Fins
- A Helicopter Pilot Was Texting Minutes Before He Crashed And Killed 4 People
- Boeing's Dreamliner Is Coming Back To Service Next Month
- Boston Fire Department