The infiltrators fled the scene after the A.U.-U.N. police unit returned fire, the mission said.

CNN: STORY HIGHLIGHTS

In 2009, a weak market forced Toll to cut prices by 25% on three-bedroom units at its massive 450-unit Northside Piers in Brooklyn, N.

WSJ: Toll Brothers Goes Condo

"They overwhelm a victim's phones so that the bank can't call the victim and the victim can't call them, " says Timothy Ryan, supervisor for the cyber-investigations unit of the FBI's Newark, N.

WSJ: Hack Attack: How to Protect Your Online Accounts