A New York man who protested the G20 summit in Pittsburgh may be the first to be arrested for using text messaging to coordinate protesters, documents indicate.

A criminal complaint filed in Pittsburgh, the site of last month's Group of 20 meeting, accuses Elliot Madison, 41, a New York City social worker who has described himself as an anarchist, of using text messaging to "(direct) others, specifically protesters of the G20 summit, in order to avoid apprehension after a lawful order to disperse," The New York Times reported Monday.

"He and a friend were part of a communications network among people protesting the G20," Madison's lawyer, Martin Stolar, told the Times. "There's absolutely nothing that he's done that should subject him to any criminal liability."

The newspaper said the FBI was authorized to raid Madison's home in the borough of Queens and there seized electronic equipment, newspapers, books and gas masks.

The Times said police appear to be increasingly aware of texting as a method of communication among protesters, reporting that Madison, who was released on bail shortly after his arrest, may be among the first to face charges while sending electronic information to protesters about the police.