Man with pellet gun arrested outside of John Kerry's Boston home

Boston police arrested a man seen photographing the home of US Secretary of State John Kerry, and in possession of a pellet gun in his car.

The man was seen taking a picture of a window in Kerry's home by the diplomatic security guard for the top US diplomat, spokesman Glen Johnson said in a statement.

Kerry was out at the time visiting his wife, Teresa Heinz Kerry, who is undergoing treatment at the Spaulding Rehabilitation Hospital after suffering a seizure a week ago.

The diplomatic security staff called in the Boston police, who questioned the man and discovered the pellet gun in his car.

He was arrested for possession of an open bottle of alcohol, Johnson said.