Alina Tsarnaeva, sister of the alleged Boston Marathon bombers, brothers Tamerlan Tsarnaev and Dzhokhar A. Tsarnaev, speaks to media from behind a man who identified himself as her husband at their West New York, New Jersey, apartment on Friday, April 19, 2013. (Video by Frances Micklow/The Star-Ledger)

A woman who identified the Boston Marathon bombing suspects as her brothers said she can't comprehend what happened this week in Massachusetts - any of it.

"They were great people. I never would have expected it," said the woman, of the suspects in Monday's bombing. "They are smart - I don't know what's gotten into them."

Through a slight crack in the door of a West New York apartment this morning, the woman answered a few questions. She referred to Dzhokhar A. Tsarnaev, 19, and his brother Tamerlan, 26, as her own "brothers."

A few minutes after 11 a.m., at least a dozen FBI agents arrived at the Hudson County apartment building and created a perimeter around it.

Though they weren't let in immediately, they entered after a few minutes. Later, at about 12:30 p.m. FBI agents were seen carrying evidence boxes into the apartment.

The sister is upset but helping the FBI, said Michael Indri, police director of West New York.

"She's cooperating with authorities," he said. "Federal authorities are trying to gather as much information as possible."

There are no reports she was involved in the Boston attacks, Indri added.

Before their arrival, she wouldn't identify herself, but public records listed a woman living there with the same last name as the suspects in the Monday bombings which killed three and injured more than 170.

But she balked when media asked if she was "okay."

"No I'm not okay - no one is okay right now," she said. "I'm hurt for everyone who has been hurt. I'm sorry for all the people who are hurt and for all the people who lost their lives."

Tamerlan Tsarnaev was killed early this morning in a shootout with law enforcement in Massachusetts, authorities say.

The woman said she hadn't seen either of her brothers in several years.

But when asked about Dzhokhar Tsarnaev - currently the subject of a massive manhunt in the greater Boston area - the woman said, "He's an amazing child."

But another member of the family said the suspects were "losers." Ruslan Tsarni, identifying himself as the uncle of the suspects, spoke loudly to reporters over the sounds of helicopters from his home in Maryland.

"It is atrocity," Tsarni said. "It's a shame - they're the children of my brother... Me myself and my family had nothing to do with them for a long, long time."

When asked what spurred the attacks from the two brothers, the uncle responded bluntly.

"Being losers," he said. "They put a shame on our entire family. On the entire Chechen ethnicity.

"Anything else to do with Islam or religion is a fraud, a fake," he added. "Somebody radicalized them."