At about 15:00 (3:00 PM) EST, two explosions were heard at the Boston Marathon. First responder have located an additional two devices. Both bombs were located near the finished line and reports indicate the explosions were staggered. As of 16:44 (4:44 PM) today, 15 April 2013, no groups or individuals have claimed credit for the bombing. The exact extent of the damage and injured is not known.

Update 16-Apr- 2013 01:15 : There are now 123 injured and 3 deceased. Among the injured were trauma amputees, others had bone and soft tissue damage. No suspects yet, but the FBI is said to be checking an apartment in Revere, which is about 5 miles from Boston.

Update 17-Apr-2013 23:39: The casualty count is now 170 injured and three dead. Forensic evidence suggests the bombs were built using pressure cookers and included ball bearings and nails to intensify damage. Video from security cameras in the vicinity of the explosions have resulted in 2 suspects but no arrests have been made. Pictures of the suspects are being distributed to law enforcement. Forensic work still continues.

Update 18-Apr-2013 22:49: The FBI has released video and still photos of two individuals of interest. The suspect wearing a white cap appears in unreleased video leaving a satchel at the site of the second explosion. The FBI requests your assistance in identifying and locating these two men. The individuals are considered to be armed and dangerous and should only be approached by law enforcement.

Update 19-Apr-2013 09:03: The two persons of interest, now suspects, have been identified. The individual wearing the white cap is 19 year old Dzhokhar A. Tsarnaev. The second male, wearing the dark cap is 26 year old Tamerlan Tsarnaev. Both men are Chechen nationals who moved with the rest of their family to the United States from Kyrgyzstan. Thursday night, the two robbed a 7/11 store and at approximately 10:30 PM shot an M.I.T. campus police officer. Later that evening, the two carjacked a Mercedes SUV and lead police on a car chase that ended in Watertown, MA. Police reports indicated that during the chase, the two were throwing explosives out the windows at police. Cornered, a gun battle ensued and 26 year old Tamerlan Tsarnaev was killed. However, Dzhokhar Tsarnaev got back into the stolen SUV and crashed through police lines escaping into the night. Police are conducting a house-to-house search for the escaped suspect.

The picture on the left is a Seven Eleven security camera photo of  19 year old Dzhokhar Tsarnaev.

Update 19-Apr-2013 23:39: 19 year old Dzhokhar Tsarnaev is in police custody tonight. He is at Beth Israel Deaconess Medical Center undergoing surgery for wounds incurred in last night’s gun battle. Acting on a homeowner’s tip, police found Dzhokhar Tsarnaev  hiding in a boat, covered by a tarp, sitting on its trailer in a Watertown home driveway. The boat’s owner noticed one of the tarp cover straps had been cut. He approached to investigate when he noticed traces of blood; as he looked under the boat’s tarp, he saw Dzhokhar Tsarnaev  laying on the bottom of the boat covered in blood. When police and FBI arrived at the scene, reports indicate, there may have been gunfire exchanged; however, the FBI’s hostage rescue unit was able to capture Tsarnaev.

We wish to congratulate the Watertown Police, Boston Police, FBI and MA State Police for a brilliant job, the entire operation was well coordinated and executed, from start to finish. Well done!

Boston may now breath a sigh of relief as this ordeal is over… Sadly, these two men leave over 180 seriously injured and  4 dead – including an MIT campus police officer.