Palestinian militants burst into a Gaza City mourning tent set up for late President Yasser Arafat on Sunday and fired shots in protest at the presence of his successor Mahmoud Abbas, but he was unhurt, witnesses said. Palestinian officials said it was not an assassination attempt. A Palestinian security man was fatally wounded in an exchange of fire between the militants and bodyguards shielding Abbas, also known as Abu Mazen, witnesses said. Abbas, who officials later said was safe in his Gaza City office, had been on a visit to accept condolences for the Palestinian president, who died in a French military hospital near Paris on Thursday at the age of 75. Abbas has been chosen as chairman of the executive committee of the Palestine Liberation Organisation, one of the posts held by Arafat.