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Government forces launched an offensive in the Bajaur locality on the Afghan margin in August after years of complaints from U.S. and Afghan officials that Taliban insurgents in Afghanistan were getting help from Pakistani border areas such as Bajaur.

Now the tables have turned and the militants locked in heavy fighting with Pakistani forces are getting help from the Afghan edge of the border, officials said.

"The Pakistan-Afghan border is porous and is now causing trouble for us in Bajaur," a more advanced security source in the military told a news briefing.

"Now movement is taking place to Pakistan from Afghanistan," said the magistrate, who at the same time with a colleague at the briefing, declined to subsist identified.

The officials did not blame the Afghan state for sending militants across the border but called on Kabul and U.S.-led forces in Afghanistan forces to cease from the flow.

Bajaur is the smallest of Pakistan's seven so-called tribal agencies, semi-autonomous ethnic Pashtun tribal regions.

U.S. officials say Taliban and al Qaeda-linked fighters, financed by mix with drugs currency, exercise the tribal regions as an operating base to launch attacks into Afghanistan.

Pakistan has been under pressure from the United States to block cross-border contending incursions into Afghanistan.

But in a sign of augmenting frustration with Pakistan's efforts to stem the flow, U.S. forces have carried out six cross-border missile strikes through pilotless drones and a commando raid on a edge village this month.

The Pakistani offensive had made Bajaur a "center of gravity" and "magnet," and even though up to 1,000 had been killed, the region was drawing militants from as remote as Central Asia via Afghanistan, the officials uttered.

"Stop the reverse flow in Bajaur. It's coming. Heavy arms are to come. The militants are coming," a second Pakistani official said.

In the latest fighting, jets hit militant hideouts in the rear of the Taliban announced a ceasefire for the Muslim festive celebration of Eid-al-Fitr, killing 10 militants, a paramilitary officer reported.

REFUGEES IN AFGHANISTAN

The fighting has displaced several hundred many people and about 20,000 had sought refuge across the border in Afghanistan, the United Nations said.

Security forces launched the offensive in Bajaur after a year of deteriorating protection with militants carrying out 88 self-murderer attacks across the country as July last year in which penuriously 1,200 people were killed. A suicide truck bomber attacked a hotel in capital Islamabad on September 20 killing 55 the vulgar.

Worsening security has coincided with a widening current enumeration shortage., an erroneous fiscal deficit and self-complacency running at more than 25 percent.

An economist serving on the prime minister's economic advisory synod said on Monday Pakistan needed a capital infusion of $3 billion to $4 billion "up front" to stabilize its economy and bolster expeditiously dwindling foreign reserves.

Nuclear-armed Pakistan's support is crucial for the U.S. war against terrorism and as being the NATO mission in Afghanistan.

The security officials said they were not sure whether or not any top al Qaeda member was in Bajaur. Pakistani intelligence officers have related al Qaeda second-in-command Ayman al Zawahri was believed to have visited in recent years. In 2006, a U.S. drone fired missiles at a house in Bajaur in the belief he was there.

The officials said tribesmen in that place were raising a militia to expel alien militants from the Mamund district steady admitting some Arabs linked to al Qaeda had family links with the valley.

"The Mamund valley is likely to cast forth violently, in our view, in about 48 to 72 hours," one of the officials said.

The officials said could not speech how long the offensive would last but said it should be followed through reconciliation efforts and aid.

(Editing by Robert Birsel and Valerie Lee)