Islamabad , Pakistan ( CNN ) -- A suspected U.S. drone strike in Pakistan 's tribal region on Wednesday killed 23 suspected militants , intelligence officials told CNN . Two Pakistani intelligence officials said the suspected drone fired four missiles at a militant training center in the area of Roya Naray in North Waziristan , one of the seven districts of Pakistan 's volatile tribal region bordering Afghanistan . The intelligence officials asked not to be named because they said they are not authorized to speak to journalists . Based on a count by the CNN Islamabad bureau , Wednesday 's suspected drone strike was the 32nd this year . CNN 's Nasir Habib contributed to this report .
Suspected drone attack is in volatile North Waziristan . There have been 32 suspected drone attacks in Pakistan .