Lawrence County emergency dispatchers say the accident occurred around 5:30 p.m. Saturday on a Mercer County road, about 60 miles northwest of Pittsburgh. Lawrence County rescuers were called to assist.
Officials said the injured person in the buggy suffered serious injuries and was flown to St. Elizabeth Health Center in Youngstown, Ohio. A hospital spokeswoman said the man's condition was still being evaluated Saturday night and she did not have an update.
Pennsylvania State Police were investigating. They didn't release any further details.