Boston Marathon Bombing, MIT University Security Policeman Killed - One Suspect Killed and One Suspect On The Run. Bombers Are Chechen Brothers - UPDATE: "Suspect No 2" Dzhokhar Tsarnaev is now in custody!

By Kathleen

Less than twelve hours after the FBI released photos of the men suspected of carrying out the Boston Marathon bombing an MIT University Officer was shot and killed in the line of duty on the MIT Campus. Within a short time reports were being called in to various news agencies that a violent exchange involving multiple gunshots and explosions was taking place in the streets of the quiet Boston suburb of Watertown. A policeman involved in this exchange is in a critical condition in hospital.

Police at the scene have said that the incident at MIT University and the shootings in Watertown are definitely related and reports have just come in that these events and the suspects who took part in them are also linked to the terrible Boston Marathon bombings. 

One suspect, the one with the darker cap was killed early on Friday morning, and the other suspect, the one with the white cap, is believed to still be in the area and is being actively searched for by a large police force. Watertown residents are requested by the Boston Police Department to stay indoors until the suspect is apprehended as he is believed to be armed and dangerous.

There are reports that there are explosives all over the streets that need to be collected and detonated so there will be some controlled explosions which will be preceded by a siren. 

I will update the post as more news comes in. 

Update:

It has been confirmed that the suspects are brothers and that they have Chechen origins. 

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Update 2:

After a long hunt, suspect No 2, Dzhokhar Tsarnaev, is now in custody! He was caught in Watertown, MA.