Islamabad, Pakistan (CNN) -- About 100 insurgents attacked a security post early Thursday in Pakistan's volatile tribal region that borders Afghanistan, killing eight soldiers and wounding 12, intelligence officials told CNN.
The insurgents fired rockets at the checkpoint in the South Waziristan town of Maroobi, said two Pakistani intelligence officials, who spoke on condition of anonymity because they were not authorized to release the information.
The insurgents opened fire at about 50 Pakistani soldiers at the post, the officials said. Fighting between insurgents and the soldiers raged for about an hour, they said.
Up to 12 insurgents were killed in the fighting, the officials said.
The brazen attack comes a day after a suspected U.S. drone strike hit an alleged militant training camp, killing 23, intelligence officials said.