ພາບການຕາມລ່າໂຕ ຜູ້ຕ້ອງສົງໄສ ວາງລະເບີດ ທີ່ຍັງເຫລືອ

A man looks out of his door as a SWAT team member knocks on his neighbors door as they search for the remaining suspect in the Boston Marathon bombings in Watertown, Massachusetts April 19, 2013.

Police officers take position during a search for the Boston Marathon bombing suspects in Watertown, Massachusetts April 19, 2013.

A barefooted woman runs for cover as police surround a home while searching for a suspect in the Boston Marathon bombings in Watertown, Mass., April 19, 2013.

A suspect wanted for questioning in relation to the April 15 Boston Marathon bombing is seen in handout photo released through the Boston Police Department Twitter page, April 19, 2013.

Police walk down School and Walnut Street on April 19, 2013 in Watertown, Massachusetts.

A woman looks out a window at her home as police start to search an apartment building while looking for a suspect in the Boston Marathon bombings in Watertown, Mass., April 19, 2013.

Images released by Federal Bureau of Investigation (FBI) shows "Suspect 2" (L-white cap) and "Suspect 1" (R-black cap) in the crowd before the blast at the Boston Marathon on April 15, 2013.

Police on School and Walnut Street as the search continues for a suspect on April 19, 2013 in Watertown, Massachusetts.

Residents view police in tactical gear conduct a search for a suspect in the Boston Marathon bombings, April 19, 2013, in Watertown, Mass.

Ruslan Tsarni, the uncle of the Boston Marathon bombing suspects, walks into his home in Montgomery Village in Md. Friday, April, 19, 2013.

A Montgomery County, Md. police officer pushes the media back from in front of the house of the uncle of the Boston Marathon bombing suspects, Friday, April 19, 2013, in Montgomery Village in Md. The uncle, Ruslan Tsarni of Montgomery Village, Md., told T

Police officers keep a man on the ground in Watertown, Massachusetts April 19, 2013 following the shooting of a police officer at the Massachusetts Institute of Technology (MIT).

Police with guns drawn search for a suspect on April 19, 2013 in Watertown, Massachusetts.

Police officers keep a man on the ground in Watertown, Massachusetts April 19, 2013 following the shooting of a police officer at the Massachusetts Institute of Technology (MIT).