Islamabad, Pakistan (CNN) -- Two suspected U.S. drone strikes killed 13 alleged militants in Pakistan's tribal region Tuesday, intelligence officials said.
The first strike killed nine people. Two intelligence officials said three missiles were fired Tuesday morning on the suspected hideout of militants in the Shawal area of North Waziristan, one of seven districts in Pakistan's tribal region bordering Afghanistan.
The second strike killed four people in Pakistan's tribal region Tuesday evening, intelligence officials said.
Two missiles were fired on the vehicle of suspected militants in the area Qutab Khel of North Waziristan, one of seven districts in Pakistan's volatile tribal region bordering Afghanistan, two intelligence officials said.
The intelligence officials asked not to be named because they were not authorized to speak to the media.
On Sunday, a suspected U.S. drone strike killed five suspected militants, while last week, officials said suspected drone strikes killed another 29 suspected militants in the region.
While the United States is the only country in the region known to have the ability to launch missiles from drones -- which are controlled remotely -- U.S. officials normally do not comment on suspected drone strikes.
Journalist Nasir Dawar contributed to this report.