Authorities on Saturday identified the victims in the incident.
Pilot Ian E. Biggs and passengers Robert Vaughn Crisp II, Carley Ann McCord, Gretchen D. Vincent and Michael Walker Vincent were killed.
The two-engine Piper Cheyenne aircraft crashed “under unknown circumstances” into the parking lot of a post office, a Federal Aviation Administration (FAA) spokesperson told The Hill in an email Saturday.
It had left from the Lafayette Regional Airport and crashed one mile west of it, the spokesperson said.
Investigators from the FAA and National Transportation Safety Board were headed to the accident site.
Local CBS affiliate KLFY reported that the aircraft was an eight-passenger plane.
Louisiana Gov. John Bel Edwards (D) called the news “heartbreaking” in a tweet.
“Please join @FirstLadyOfLA and I in praying for the families and friends of everyone affected by this terrible tragedy,” he wrote.
Updated: 2:06 p.m.