The Boston manhunt that has locked down the cities of Boston, MA and the suburban town of Watertown, MA continues as the highly extensive search on 19-year-old Boston Marathon bombing suspect, Dzhokhar Tsarnaev continues. The breakthrough on the investigation began Thursday when the FBI released images of the two bombing suspects at approximately 5:20 p.m., Thursday.

Five hours later, around 10:20 p.m. there have been reports of a robbery at a convenience store near the Massachusetts Institute of Technology campus in Cambridge and a short 10-minutes later, the MIT university police officer was found shot in his vehicle. The police officer, Sean Collier, 26, was later pronounced dead at the Massachusetts General Hospital.

At 1 a.m. today, Friday, Watertown residents report hearing gunfire and the sounds of explosion in their suburban neighborhood. According to the police, the suspects reportedly threw explosives and exchanged gunfire with authorities. The “black hat” suspect or Suspect No. 1 as identified by the FBI, was wounded and a Massachusetts Bay Transportation Authority officer was shot. Suspect No. 2 or the “white hat” suspect flees.

The wounded Suspect No. 1 was brought to Beth Israel Deaconess Medical Center with "multiple traumatic injuries," according to doctors overseeing the patient. He was later pronounced dead. Mass transit was then ordered to be shut down and several Boston-area neighborhoods were locked down. Police has told residents to stay indoors. Classes at MIT, Harvard and other area school are canceled for the day.

At approximately 7 a.m. law enforcement officials identify the surviving Boston bombing marathon suspect as Dzhokhar A. Tsarnaev, 19, of Cambridge, Mass. They say the suspect who died is his brother.

Reports have also arised that a third man, who authorities believe was an accomplice of the bombing suspects, has been arrested.

At approximately 7:55 a.m. the National Security officials identify the dead suspect as Tamerlan Tsarnaev.

UPDATE: CNN reported that Tamerlan has a 3-year-old kid and a wife and showed at around 2:00 p.m. the former residence of the brothers in Watertown, MA.

Officials have extended at around 8 a.m. the “shelter in place” advisory to the entire city of Boston. Taxi service in Boston is suspended about half-an-hour later. Forty-five minutes later, law enforcement officials converged on a house in Watertown. Media crews reported hearing police on loudspeakers and urge someone inside to come out. Police activity in the area later dissipated.

An hour later, the White House reports that President Obama, Vice President Joe Biden and the national security team held a White House Situation Room briefing on the investigation and the events in Boston and Watertown.

Before noon, the Boston police tweeted that they have located a 1999 gray Honda CRV has been linked on the investigation. According to a report by the NPR, authorities are processing the car for evidence.

A report by Christopher Bedford showed that the suspect on the loose was still tweeting after the mass murder.

The twitter account of Dzhokhar Tsarnaev, remained active on the social media site. It was seen that he made chilling but definite, and apparent, references to the attacks and the aftermath.

There was, according to CNN, a total of 12 tweets since after the Monday’s bombing.

Numerous leads, friends and even family members, who claimed that the brothers have brought shame to many Chechens – where they have descended – and their family says that the Dzhokhar was a normal teenage kid.

Tsarnaev worked at a Harvard pool and was part of the wrestling team.

In what is a creepy discovery, reports have indicated that Suspect No. 2 became an American citizen September 11, 2012.

The FBI is asking anyone with information on the suspect to call 1-800-CALL-FBI or 911.