Later, the Boston Police Department announced that "all vehicle traffic" in Watertown was suspended and asked that businesses remain closed. The transit authority sent buses to evacuate residents, while bomb squads combed the area.
Cambridge police -- already slammed -- announced on Twitter that they had fielded more than a dozen calls about suspicious packages in the city. All were cleared without incident.
As dawn came, police announced they were conducting a controlled detonation near Kenmore Square, across the river from MIT. They also released a vehicle description: "Police seeking MA Plate: 316-ES9, '99 Honda CRV, Color - Gray. Possible suspect car. Do not approach."
The car was later located in Cambridge, but Dzhokar Tsarnaev was not found.
Another controlled detonation was announced later in the day, as well as another lookout, this one for a green 1999 Honda sedan.
As the situations in Cambridge and Watertown continued to unfold well into the afternoon, many residents woke to a city in turmoil, though some aspects of life were returning to normal, including taxi service and trash pickup. Still, residents were nervous.
Tweeted @BarryGagne of Watertown, "I'm seriously scared right now. Way to close to my house. (2blcks)Afraid of explosives. Everything. Be safe people #watertown #bostonstrong"
Back in Cambridge, authorities erected a blue tent-like tarp outside the suspects' home. Much of the home's contents was placed beneath it, and reporters, who had been kept a block away from the scene, were allowed to have a closer look.
Though across-the-street neighbors Santos and Jorge didn't know the suspects, they had succinct sentiments regarding their fate: They hope the remaining suspect meets the same end as his brother.
"I hope he's found dead," Santos said. "I don't think we should pay U.S. taxpayer dollars to give him a fair trial. Nah."
Jorge concurred: "I feel the same. For me, it's better. I can sleep more."