Transcript for New developments in the attack on Sen. Rand Paul
developments in the attack on senator Rand Paul. A neighbor allegedly tackling him outside his home. Here's ABC's linsey Davis. Reporter: Tonight, the FBI and Kentucky police are investigating a dispute between senator Rand Paul and his neighbor of 17 years that left the Kentucky lawmaker with serious injuries, including five rib fractures and lung contusions. The 54-year-old senator was outside his bowling green home Friday when, according to police, his neighbor, 59-year-old Rene Boucher, tackled him from behind. Boucher's lawyer released a statement, saying, "It was a very regrettable dispute between two neighbors over a matter that most people would regard as trivi trivial." But a senior adviser for Paul is offering a different account, saying, "It is a pending, serious criminal matter involving state and federal authorities." We are waiting to obtain medical records, things of that nature. Reporter: Boucher, who like Paul is a medical doctor, was charged with fourth degree assault. We don't yet know what started the dispute and tonight senator Paul's office saying its unclear when he can return to Washington, because his injuries have left him unable to fly. David? Linsey, thank you.
This transcript has been automatically generated and may not be 100% accurate.