No signs of violence or a struggle were found after the body of an elderly man was discovered at Marine Park in South Boston Wednesday morning, the Suffolk County District Attorney's office said.

The man's body was found near a park bench and authorities described him as a Walpole resident in his late 70s or early 80s. Police do not expect to release his identity until the state medical examiner determines cause of death.

A passerby discovered the man aroudn 7:20 a.m. Wednesday, and a state police official said it was unclear how long the body had been there, the Boston Herald reported.