Dozens of Jacksonville police officers, along with the SWAT team, responded to a Southside home, only to find it was empty.
Jacksonville police said they had reason to believe a man had barricaded himself inside his house in the 1000 block of Beckley Place, and could potentially harm himself.
Police said there were others inside the home, but they came out and were unharmed.
Jacksonville Sheriff's Office spokeswoman Melissa Bujeda said the SWAT team made entry into the home around 11:10pm, hours after they surrounded it. She said they didn't find anyone in the home.
Police said they responded because a 911 dispatcher received a call from the man's relative shortly before 4 p.m. who said he may be in danger and may harm himself.
Police told residents they need to leaves their homes for their own safety. They were allowed to return after the home was determined to be empty.
On Monday morning, patrol officers continued to search for the man who was believed to be inside. They said the man wasn't a danger to the public, just himself.
Police did not release his name or age.
Anyone with information about where the man is should call the Jacksonville Sheriff's Office at 904-630-0500.