As a manhunt for the second—and only still living—suspect in the bombing of 117th Boston Marathon earlier this week transfixes the nation and most of the world, much of Boston, neighboring Watertown, and surrounding areas have been on lockdown as officials conduct its search. This photo, taken at 11:45 a.m. EST, captures a desserted Congress Street looking toward the typically bustling Post Office Square. See more eerie images of a city on lockdown. Jim Davis/The Boston Globe, via Getty A message calling for citizens of Boston to “shelter in place” flashes on a sign on I-93 near the Zakim Bridge in Boston Friday. The Boston area was all but paralyzed as a manhunt continued for Dzhokhar Tsarnaev, one of the two suspects in the Boston Marathon bombing, who authorities say killed an MIT police officer and hurled explosives at police in a car chase and gun battle overnight that left his brother, Tamerlan Tsarnaev, dead. Elise Amendola/AP Small signs are posted in the Boston Public Gardens. The area was completely devoid of people Friday after Boston’s Mayor Thomas Menino and Massachusetts Gov. Deval Patrick asked all residents of the city and several surrounding towns to remain at home and not to go to their places of work while investigators searched for Dzhokhar Tsarnaev. Dominic Chavez/EPA, via Landov With the Boston area on lockdown, only a few pedestrians are seen crossing the Massachusetts Avenue bridge. Jonathan Wiggs/The Boston Globe, via Getty The view at the popular Boston Public Gardens Friday morning just before 11 a.m. EST reveals lots of color but no people. Jim Davis/The Boston Globe, via Getty Congress Street at its intersection with Milk Street in the Financial District is typically one of the busiest corners in the city but was absent of any activity Friday morning at 11:45 p.m. EST. Jim Davis/The Boston Globe, via Getty Commonwealth Avenue in Downtown Boston is completely empty of vehicle traffic. Dominic Chavez/EPA, via Landov Crowds of tourists typically teem along the street near the historic Faneuil Hall (on left, with white cupola) and City Hall, but the area was empty Friday. Neal Hamberg/Reuters, via Landov Storrow Drive is nearly empty from all vehicle traffic in Boston. Dominic Chavez/EPA, via Landov