Tunceli, Thursday,

TURKISH troops backed by air power today killed dozens of Kurdish guerrillas in a large cross-border raid against a rebel base in the mountains of northern Iraq.

``It is the biggest cross-border operation in the past four months or so,'' said a military official in the eastern Turkish town of Tunceli.

The regional governor's office in the nearby city of Diyarbakir said that troops began to pull back towards Turkey after killing 44 Kurdistan Workers Party (PKK) rebels. Security officials said three troops were wounded.

Twelve battalions of commandos, police special forces, and around 250 members of a pro-government Kurdish militia poured five miles across the border in a five-pronged attack from the Turkish province of Hakkari.

A Turkish battalion consists of between 500 and 600 men.

The officials said US-made Cobra helicopters and air force planes pounded suspected guerrilla positions.

The operation was aimed at around 500 rebels at a base known as Mezi just inside Iraq, the official said.

Northern Iraq has been protected from Baghdad by a Western allied air force based in southern Turkey since shortly after the end of the Gulf War in 1991.

A six-week drive into Iraq by around 30,000 troops last year brought criticism from Turkey's Western allies but failed to oust the rebels, who are fighting for autonomy or independence for the Kurdish-populated region of south-east Turkey.-Reuter.