Boston Marathon Bombings
Three people are dead and dozens more injured after two bombs exploded near the finish line of the Boston Marathon. Reuters

Two bombs exploded Monday afternoon on Boylston Street near the finish line of the 2013 Boston Marathon, killing two people and injuring many dozens more. Local hospitals have admitted at least 110 people, with eight of them in critical condition and 14 in serious condition. The bombings put local authorities across the U.S. on high alert and brought the city of Boston to a standstill.

The chaotic scene at the Boston Marathon prompted a temporary shutdown of the city’s mass transit systems, while the Federal Aviation Administration issued a “ground stop” at 4:50 p.m. EDT, enforcing a temporary no-fly zone that grounded all flights to and from Boston's Logan International Airport for about a half-hour before it was lifted at 5:20 p.m.

The city’s subway service resumed Monday evening with “residual delays,” but some stations remained closed.

The situation regarding mass transit across the populous Northeast Corridor from Boston all the way down to Washington, D.C., was tense into the evening Monday. Here’s a look at the latest updates:

Logan International Airport: “Flights are departing/arriving from Logan; please check with your airline for delays or flight changes.”

The FAA had earlier announced a ground stop for Logan, but flights have since resumed.

“Please note: Logan airport is open. We encourage you to contact your airline for any flight changes prior to coming to the airport.”

Massachusetts Bay Transportation Authority: “Normal service resuming on all lines. DTX and Park Street have reopened. Expect some residual delays.”

“Copely Station will remain closed until further notice.”

New York City Police Department: “The NYPD is stepping up security at hotels and other prominent locations in the city.”

Metropolitan Transportation Authority of the State of New York: “The MTA Police Department, which patrols the LIRR and Metro-North, is increasing police patrols today in response to the Boston incident.”

“NYPD is also on alert and indicated they will give additional attention to the subway system.”

New Jersey Transit: “NJ Transit is currently in a heightened state of alert. As always, please report suspicious, unusual activity to the NJTPD by texting to 65873.”

Washington Metropolitan Area Transit Authority: “There’s no specific or credible threat against the Metro system at this time. Extra officers are on duty for increased security.”

All passengers were reminded to report unattended packages or suspicious activity to the Metro Transit Police at 202-962-2121.

Amtrak: “At this time, all Amtrak trains are operating as scheduled. We will provide an update if this changes.”

Amtrak said it has increased security at stations and track right-of ways. It asked passengers to report anything suspicious to 800-331-0008.