A 28-year-old man fell into Lake Lanier and did not resurface in a probable drowning over the weekend, law enforcement officials said.

Deputy Nicole Bailes, spokeswoman for the Hall County Sheriff’s Office, said alcohol may have been a factor in the incident. She said the victim lost his balance and witnesses reported he may have struck his head when he fell.

According to Bailes, emergency officials received calls about the incident at 1:30 a.m. Sunday and Hall County Fire Services responded to the scene at Sunset Cove.

“Hall County fire made initial rescue attempts but was met with too many obstacles and the rescue became too dangerous,” Bailes said in an email.

She said the dive team for the sheriff’s office spent Sunday searching for the victim in an area about 50 feet deep. Divers from the Department of Natural Resources also participated in the search.

They called off the search Sunday afternoon and planned to resume today at 8:30 a.m.

“We have utilized all of our air tanks and our divers our exhausted,” Bailes said shortly before 4 p.m. Sunday.

The Associated Press reported sonar equipment from South Georgia was being sent to aid in the search. Bailes said it is the only sonar equipment in the state and was being used in connection with a plane crash in South Georgia.