Boston Marathon bombing suspect identified as 26-year-old Tamerlan Tsarnaev. Photo: FBI.
WASHINGTON -- 2 U.S. officials say evidence suggests Boston suspects motivated by religion, worked alone.
In Cambridge, a mosque where the two Boston Marathon bombing suspects sometimes attended services says one of them had outbursts during two sermons that encouraged Muslims to celebrate American institutions such as the Fourth of July and figures like Martin Luther King Jr.
The Islamic Society of Boston Cultural Center says in a statement released Monday that Tamerlan Tsarnaev argued with a preacher during a service at its Cambridge mosque in November about U.S. holidays.
The center says he returned to services and in January called an elder a "hypocrite" for praising Martin Luther King Jr.
The center says congregants shouted at him, telling him to leave. The mosque says there were no further incidents after that, even as he continued attending prayers and services.