FORT PIERCE — A man told police he ducked for cover behind a brick building after exchanging shots with one of three men who showed up to buy a cell phone from him.

Fort Pierce police are looking for the three men suspected in connection with the shoot-out that took place between 7:15 and 8:30 p.m. in the 400 block of North 16th Street Monday, according to a police report.

Police said they talked with a visibly shaken 40-year-old man and a 38-year-old woman who told them they had arranged through the LetGo app to sell an iPhone XS to a buyer who changed meeting places from an address on North 18th Street to North 16th Street.

The LetGo app is an online marketplace for buying and selling items locally.

The man and woman said in the report that when they arrived at the new location, they were met by three men in front of a pink house.

They told officers the person they thought they were meeting said he needed to take a few pictures and told them he needed to ask his mother “if he could get the phone.”

While he was holding the phone, he turned to a "heavy-set" man and asked him for money. That man walked across the street, returned, then all three men ran, the couple told officers in the report.

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Police said the man told them he chased after one of the three and shouted, “I have a gun."

The man he was chasing was armed. He turned and opened fire, according to the report.

“He pointed it at me and fired … approximately three shots,” the man said in the report. “I then pulled my gun and returned fire, shooting two rounds toward the suspect.”

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Police said they went to the scene but could not find evidence of the shooting due to the time of night and the physical conditions of the area, such as tall grass that could hide bullet casings.