Top Pakistan officials said Obama's comment was irresponsible and likely made for political gain in the race for the Democratic nomination.

"It's a very irresponsible statement, that's all I can say," Pakistan's Foreign Minister Khusheed Kasuri told AP Television News. "As the election campaign in America is heating up we would not like American candidates to fight their elections and contest elections at our expense."

Obama said in a speech Wednesday that as president he would order military action against terrorists in Pakistan's tribal region bordering Afghanistan if intelligence warranted it. The comment provoked anger in Pakistan, a key ally of the United States in its war on terror.

Many analysts believe that top Taliban and al-Qaeda leaders, including Osama bin Laden, are hiding in the region after escaping the US-led invasion of Afghanistan in 2001.