A suicide bomber rammed a car into a Pakistani paramilitary checkpost in the South Waziristan region today, killing eight soldiers.
The attack near the Afghan border came two days after suspected US missile strikes in the ethnic Pashtun tribal regions of South and North Waziristan killed about 20 people, including militants.
The attack was on a checkpost of the paramilitary Frontier Corps (FC), about 35 km west of Wana, the main town in the region which is claimed to be a sanctuary for al Qaeda and Taliban militants.
"It was suicide attack. The bomber drove his explosive-laden into the FC checkpost," said military spokesman Major General Athar Abbas referring to paramilitary Frontier Corps.
"We have confirmed reports of eight deaths," he said.
Mounting violence in nuclear-armed Pakistan has raised concern about prospects for the important US ally whose help is seen as vital in stabilising neighboring Afghanistan.
The violence has also unnerved investors, compounding an economic crisis that looks set to force the country to agree to International Monetary Fund help.
Yesterday, Pakistani Taliban militants threatened to carry out attacks in response to missile strikes by US drone aircraft.
Frustrated by an intensifying insurgency in Afghanistan, US forces have carried out about 15 missile strikes and one ground troop incursion into Pakistan since the beginning of September.
Pakistan, which is also battling militants on its side of the border, strongly objects to the U.S. strikes.
It says the attacks are a violation of its sovereignty and undermine efforts to isolate the militants and rally public opinion behind the unpopular campaign against militancy.
The government summoned the US ambassador last Wednesday to demand that the strikes be stopped.
The United States has shrugged off Pakistani protests. It says the attacks are needed to protect US troops in Afghanistan and kill Taliban and al Qaeda militants who threaten them.