Yes. These FBI documents, released September 2, 2016, state that one of Clinton's aides smashed one or two blackberries with a hammer. From Document 1 page 9 of 47:
Monica Hanley, a former Clinton aide, often purchased replacement BlackBerry devices for Clinton during her tenure at State. Hanley recalled purchasing most of the BlackBerry devices for Clinton from AT&T stores located in the Washington, D.C. area. Whenever Clinton acquired new mobile devices, Cooper was responsible for setting up the new devices and syncing them to the server. Abedin, [REDACTED], and Hanley also assisted Clinton with setting up any new devices. According to Abedin, it was not uncommon for Clinton to use a new BlackBerry for a few days and then immediately switch it out for an older version with which she was more familiar. Clinton stated that when her BlackBerry device malfunctioned, her aides would assist her in obtaining a new BlackBerry, and, after moving to a new device, her old SIM cards were disposed of by her aides. Cooper advised he sometimes assisted users, including Clinton, when they obtained a new mobile device by helping them back up the data from the old device before transferring it to the new device and syncing the new device with Clinton's server. Abedin and Hanley indicated the whereabouts of Clinton's devices would frequently become unknown once she transitioned to a new device. Cooper did recall two instances where he destroyed Clinton's old mobile devices by breaking them in half or hitting them with a hammer.
This wired article discusses how this is not a good way to dispose of a phone that contains secret information. They suggested using a blender and fire.