Georgia Department of Natural Resources Commissioner Walter Rabon said Sunday morning that at least 40 people were on the gangway and that half fell into the water. The dock gave way before 4 p.m. in a "catastrophic failure," prompting a response from the Coast Guard and state and local agencies.

Georgia authorities say they are investigating the “catastrophic failure” of a dock gangway that collapsed, killing seven on Sapelo Island.

Officials were on location in Georgia Sunday investigating the collapse of a ferry dock gangway that left seven people dead and six others critically injured Saturday.