KENTUCKY -- Sen. Rand Paul is recovering from five broken ribs after being assaulted in his home in Kentucky over the weekend.

A senior adviser says it's unclear when Paul will return to work, since he's in considerable pain and has difficulty getting around.

Police arrested 59-year-old Rene Boucher on Saturday, and charged him with misdemeanor fourth degree assault with a minor injury.

Boucher is accused to attacking Paul on Friday, but officials have not released a motive.

Boucher lives next door to Paul and his wife, according to Warren County property records.