A suicide bomber Friday drove a car filled with explosives into a military convoy, killing at least two soldiers in a restive northwestern Pakistani tribal area bordering Afghanistan.

A suicide bomber Friday drove a car filled with explosives into a military convoy, killing at least two soldiers in a restive northwestern Pakistani tribal area bordering Afghanistan, officials said.

The bomber crashed his white Toyota Corolla into a vehicle travelling in a military convoy in Wana, the main town in the South Wasiristan tribal district, a stronghold of Taliban militants.

"At least two security forces personnel have embraced martyrdom and two others were wounded," a senior security official told media outlets.

Pakistan is a frontline state in the US and NATO-led fight against militants in Afghanistan. It says more than 40,000 people have been killed in Pakistan by Taliban and Al-Qaeda-led militants, who oppose Islamabad's US alliance.