Update, 8:50 p.m.: Boston bombing suspect Dzhokhar Tsarnaev is alive and in custody.
The 19-year-old was taken into custody after a tense standoff with police in Watertown, Mass. Law enforcement officials had scoured and locked down the neighborhood after a woman reported seeing blood on the boat in her backyard.
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We are tracking the very fast-moving developments overnight and this morning in the Boston area, where police say one of the two Boston Marathon bombing suspects is dead and the other still at large. Boston and surrounding communities are in a state of lockdown as police hunt for Dzhokhar Tsarnaev, a 19-year-old of Chechen origins. His brother, Tamerlan, was killed in a shootout with police but not before an MIT police officer was killed. This morning, Gov. Deval Patrick ordered residents of the Boston area to stay indoors, as the suspect at large is armed and extremely dangerous.
READ THE LATEST ON THE MANHUNT HERE
The manhunt stepped up in intensity after the suspects robbed a 7-11 convenience store last night. Later, police say they carjacked a Mercedes SUV and held its driver before releasing him unharmed.
Chechnya has long been a breeding ground for terrorists, but until now, most of their attacks were centered on targets in Moscow or elsewhere in Russia. The Boston Marathon bombing would be the first Chechen terror attack on the West. The Tsarnaev brothers are from Chechnya but lived in the U.S. at least a year.