Timeline:

The search for the Boston Marathon bombing suspects


April 19

Around 8:42 p.m.
Around 6:30 p.m.
Around 12:35 p.m.
Around 11:30 a.m.
Around 10:35 a.m.
Around 10:20 a.m.
Around 8:40 a.m.
Around 6:45 a.m.
Around 6:35 a.m.
Around 4:30 a.m.
Around 1 a.m.

April 18

Shortly after 10:30 p.m.
10:30 p.m.
Around 10:20 p.m.
5:10 p.m.

April 15

2:49 p.m.

Source: Associated Press