CAIRO, Egypt -- Osama bin Laden warned in a new audiotape of a "severe" reaction for Europeans' publication of cartoons of Islam's Prophet Muhammad in what experts saw as a direct threat of a new attack in Europe.
The message, posted late Wednesday on a militant Web site that has carried al-Qaida statements in the past and bore the logo of the extremist group's media wing al-Sahab, showed a still image of bin Laden aiming with an assault rifle.
"The response will be what you see and not what you hear and let our mothers bereave us if we do not make victorious our messenger of God," said a voice believed to be bin Laden's, without specifying what action would be taken.
Ben Venzke, the head of IntelCenter, a US group that monitors militant messages, called Wednesday's video a "clear threat against EU member countries and an indicator of a possible upcoming significant attack."
The five-minute message, bin Laden's first this year, made no mention of the fifth anniversary Wednesday of the US-led invasion in Iraq.
It came as the Muslim world marks the Prophet Muhammad's birthday Thursday and amid the reigniting of a two-year-old controversy over Danish cartoons deemed by Muslims to be insulting.
On Feb. 13, Danish newspapers republished one of the cartoons, which shows Muhammad wearing a bomb-shaped turban, to illustrate their commitment to freedom of speech after police said they had uncovered a plot to kill the artist.
Danish intelligence service said the reprinting of the cartoon had brought "negative attention" to Denmark and may have increased the risk to Danes at home and abroad.
The original 12 cartoons first published in a Danish newspaper triggered major protests in Muslim countries in 2006. There have been renewed protests in the last month. Muslims widely saw the cartoons as an insult, depicting the prophet as violent. Islamic law generally opposes any depiction of the prophet, even favorable, for fear it could lead to idolatry.
In the message, bin Laden described the cartoons as taking place in the framework of a "new Crusade" against Islam, in which he said the pope has played a "large and lengthy role."