A spokesman for Pakistan's anti-graft body says its officers have seized currency and gold worth 680 million rupees, or $6.4 million, from the residence of top provincial financial official in southwestern Baluchistan province.

Abdus Shakoor says investigators from the National Accountability Bureau, or NAB, arrested provincial finance secretary Mushtaq Raisani in the provincial capital of Quetta on Friday.

He says the arrest on corruption charges was followed by a quick raid at Raisani's official residence, where investigators found bags stuffed with Pakistani and foreign currency, slabs of gold and financial bonds.

Raisani is accused of embezzling public funds during his three years as finance secretary.

The NAB has stepped up operations after the country's army chief sacked six officers, including two generals, on corruption charges in Baluchistan last month.