Away from the focus of the manhunt, police patrolled the quiet streets. Officers were exhausted after a succession of long shifts.
“Everybody is trying to relax,” said one officer, who asked not to be named because he did not have permission to speak to a reporter. “But it’s tough to relax when the city is in lock-down.”
Police found relief from local businesses. Uno Due Go delivered bagels and muffins. Maggiano’s Little Italy sent ravioli and chicken parmesan. Employees from Macy’s treated officers to Domino’s pizza.
“Emotions are really high,” the officer said, “but people are really being extraordinary.”
The uncomfortable silence persisted. Armed law enforcement officers guarded the Boston Convention & Exhibition Center.
The digital marquee outside displayed the Marathon symbol and the words “Boston, You’re My Home,” a song lyric President Obama quoted Thursday at an interfaith prayer service for victims of the bombings.
“Be patient,” Mayor Thomas M. Menino said at the afternoon press conference. “But I want to say as mayor of the city of Boston, we are one city . . . we will not let the terrorists win.”
At South Station, clusters of people stood on sidewalks, some with luggage, presumably stranded travelers. Heavily armed law enforcement officers surrounded the transit hub and the nearby Federal Reserve building.
“It’s like ‘Planet of the Apes’ down here,” said Michael Vaughan, who runs a public relations firm in the bustling Seaport district. “The town is just dead.”
Equity Office Properties, the region’s largest commercial landlord with millions of square feet of office space, kept most of its properties closed. Across from City Hall at Center Plaza, tenants already inside the curved building on Cambridge Street were initially not permitted to leave, according to a posting on Equity Office Properties’ website.
Financial analyst Harris Bradley biked from the Fenway to his office tower on Federal Street and tried to push his way through the locked revolving doors.
“Buildings are all shut down,” yelled a security guard in a black suit and glasses.
Bradley did not like the answer. “Financial markets don’t close just because there’s a crazy guy out there,” Bradley said.
Matthew Kiefer, an attorney with the Boston law firm Goulston & Storrs, said his 150-attorney firm on Atlantic Avenue was shut down at 8:14 a.m. He said he spoke to a client this morning who was at a Starbucks on Newbury Street.
“He was in line,” Kiefer said, “and they closed the door behind him and said, ‘Please get your coffee and leave.’ ”
Steve Steinberg, a spokesman for the real estate firm Jones Lang LaSalle, said he received an e-mail about 8 a.m. saying his building at One Post Office Square was shut.
“I was on my way in to the office, and I just turned around when I got the e-mail,” said Steinberg, who was commuting into the city on Route 1. “It was eerie. The highway was virtually empty.”
Andrew Ryan can be reached at firstname.lastname@example.org. Follow him on Twitter @globeandrewryan. Jenn Abelson, Erin Ailworth, Maria Cramer, Michael B. Farrell, Meghan E. Irons, Deborah Kotz, and Casey Ross of the Globe staff contributed to this report.