Boston area police are conducting a manhunt in Watertown, Mass., for one of the suspects in Monday's Boston Marathon bombing, and are warning media to use restraint in broadcasting locations.
Dzhokhar Tsarnaev, 19, of Cambridge was identified by Boston police Friday morning as the suspect at-large.
"WARNING: Do Not Compromise Officer Safety by Broadcasting Tactical Positions of Homes Being Searched," the Boston Police Department tweeted just before 9 a.m. Friday, as police conducted a manhunt of the area.
Tsarnaev reportedly fled after an overnight gun battle with police. His brother, Tamerlan Tsarnaev, 26, identified as the second suspect in the terrorist attack, died in the shoot-out.
In an interview with WBZ-TV, a man who described himself as an uncle of the suspects said the brothers immigrated to the U.S. without their parents in 2001 or 2002. The man called the older brother "a loser," and said he was "wordless" with regard to the current situation. He said he had not been in touch with his nephews for several years.
Around 10:30 p.m. Thursday night the Tsarnaev brothers reportedly shot and killed an MIT police officer on the college's campus after robbing a convenience store. The two men then hijacked a Mercedes SUV and fled to Watertown.
The suspects were stopped by police in Watertown. A transit policeman was critically injured in a subsequent gun battle that reportedly involved explosives.
Boston mass transit services were suspended Friday morning. Citywide taxi service has also been suspended.
The Associated Press, citing an unnamed source, reports the brothers are immigrants "from Russia region near Chechnya," a troublesome area plagued by Muslim terrorists.
Massachusetts Gov. Deval Patrick urged Bostonians to stay indoors Friday as the manhunt continues. Details are emerging about the at-large suspect, who won a $2,500 scholarship in 2011 from the city of Cambridge.