"After the sermon and the congregational prayer ended, a few volunteer leaders of the mosque sat down with the older suspect and gave him a clear choice: either he stops interrupting sermons and remains silent or he would not be welcomed," it said. "While he continued to attend some of the congregational prayers after the January incident, he neither interrupted another sermon nor did he cause any other disturbances."
Tamerlan Tsarnaev "began coming intermittently to our congregational prayers on Friday over a year ago and occasionally to our daily prayers," the statement read. "The younger suspect was rarely seen at the center, coming only occasionally for prayer."
Memorials and tributes
One of the victims, Krystle Campbell was memorialized Monday morning in a service at St. Joseph Catholic Church in Medford, Massachusetts. After the service, police officers lined the street in front of the church as other officers wearing dress uniforms saluted as the casket bearing her remains was taken from the church and loaded into a hearse.
Another memorial service was scheduled Monday night at Boston University for Lingzi Lu, a student from China. Lu was a graduate student in mathematics and statistics. Before coming to Boston, she won an academic scholarship to the Beijing Institute of Technology, where she received accolades for her math skills.
On Wednesday, Vice President Joe Biden will attend the memorial service for MIT police officer Sean Collier, who was allegedly killed by the Tsarnaev brothers.
A week after the marathon bombings, 50 people remain hospitalized, including two in critical condition, according to a CNN tally.
At least a dozen survivors have endured amputations.
Patients at Boston Medical Center have received visits from war veterans who have also suffered amputations. The vets, Dr. Jeffrey Kalish said, told patients that their lives aren't over because they've lost limbs.
"We've seen really tremendous success and great attitudes," he said.
Also Monday, Davis -- the Boston police commissioner -- said transit system police officer Richard Donohue, wounded in the firefight with the Tsarnaev brothers, was improving.
"He was in grave condition when he went to the hospital, so we're very optimistic at this point in time, and our prayers are with him and his family," he said.