Tamerlan Tsarnaev, 26, called his mother early Friday morning, alerting her that police were following him and his younger brother and that there had been a shooting.
"'The police, they have started shooting at us, they are chasing us,'" Zubeidat Tsarnaeva told ABC News in a telephone interview.
The conversation ended when Tsarnaev said, "'Mama, I love you,'" his mother said.
Tsarnaeva got frightened and started to cry and shout. He told her Dzhokhar Tsarnaev, 19, was with him before the line cut off.