ISLAMABAD, Pakistan (CNN) -- U.S. military forces launched airstrikes on a Pakistani village early Wednesday morning, two Pakistani military sources told CNN.

The U.S. conducted airstrikes on a village in the border area of North Waziristan early Wednesday, sources said.

The strikes occurred about 1 a.m. in a village in North Waziristan, a mountainous region of northwest Pakistan near the Afghanistan border, a Pakistani military source said.

U.S. military sources could not immediately be reached for comment.

The sources said the U.S. military launched two or three missiles that struck at least one home. The sources did not have any information on casualties or injuries.

According to The Associated Press, security officials say at least three people were killed and six wounded in the suspected U.S. missile strike.

The two, who commented on condition of anonymity because they were not authorized to speak to media, did not say how they knew the U.S. carried out the strike, AP reported.

U.S. attacks in Pakistan have become a controversial issue in recent weeks.

In July, President Bush approved U.S. incursions in Pakistan to go after insurgents without consulting first with Islamabad.

Pakistan has expressed displeasure with the idea and asserted its right to defend its borders

Earlier this month, Pakistani President Asif Ali Zardari said he would not allow foreign nations to violate his nation's sovereignty to pursue terrorists.

A week after that statement, Pakistani military forces fired shots at two U.S. helicopters. They said the choppers had crossed into Pakistani territory.

U.S. military officials denied that, saying the helicopters had been in Afghan territory.

CNN's Zein Basravi contributed to this report.

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