DERA ISMAIL KHAN, Pakistan, Dec 22 (Reuters) - Suspected U.S. drones fired two missiles into Pakistan's South Waziristan region on the Afghan border on Monday, killing seven people, intelligence agency officials and residents said.

One missile hit a vehicle in a village near Wana, the main town in the region, killing four people, while three people were killed in another strike in a nearby village, two Pakistani intelligence agency officials said.

"Tribesmen opened fire on the drones after the attacks," a resident of Wana told Reuters by telephone. (Reporting by Hafiz Wazir; Writing by Zeeshan Haider; Editing by Robert Birsel and Jerry Norton)

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