4 killed in suspected drone strike

Based on a CNN count, Wednesday's suspected drone strike was the 33rd this year compared to 111 in all of 2010.NEW: Ten militants killed, sources sayA suspected U.S. drone strike happened in Pakistan, officials saidThe strike was in Wana, South Waziristan

Islamabad, Pakistan (CNN) -- A suspected U.S. drone strike in Pakistan's tribal region killed 10 suspected militants on Wednesday, two intelligence officials told CNN.

The suspected drone fired four missiles on two militants' hideouts in the area of Wana in South Waziristan, one of the seven districts of Pakistan's volatile tribal region bordering Afghanistan.

Based on a count by the CNN Islamabad bureau, Wednesday's suspected drone strike was the 33rd this year compared to 111 in all of 2010.

The intelligence officials asked not to be named because they were not authorized to speak to the media.

CNN's Nasir Habib contributed to this report.

CNN