``Insertion of any additional fighters from across the LoC will only increase tensions and prolong the fighting,'' State Department spokesman James Rubin told mediapersons here.

ISLAMABAD: Several Pakistan-based militant groups meanwhile have rejected the forthcoming foreign minister-level talks between India and Pakistan on defusing tension along the LoC in Kashmir and instead stepped up reinforcements to help out their cadres in the mountainous region.

A spokesman of the Hizbul Mujahideen, the militant arm of the Jamaat-e-Islami, told PTI over phone that his outfit was opposed to the proposed talks and would in fact step up reinforcements to its cadres fighting in Kargil and drasssectors.

``We are sending fresh reinforcements to our mujahideen who are engaged in jehad across the Line of Control from our offices all over Pakistan,'' the spokesman said, indicating that his group would reject any peace overture from Islamabad to New Delhi.

Militant outfits, who openly claim responsibility for the recent intrusion across the LoC, have embarked on a country-wide enrollment drive to recruit volunteers for the ``jehad'' in Kargil in the wake of a series of reverses at the hands of the Indian army.

The Jamaat-e-Islami, the largest religio-political party in Pakistan, put out front-page advertisements in some leading dailies urging youth to enroll at special camps set up across the country.

It also invoked Islamic traditions to get youth to join in and appealed to the public to contribute towards the `jehad' fund. In a tacit approval to the proxy war being fought by these groups, Pakistani authorities have turned a blind eye to their activities despite earlier claims that Islamabad'ssupport was restricted to the ``political, moral and diplomatic'' arena.

``The Kashmiri freedom fighters obviously have some sympathisers on this side of LoC,'' a government spokesman said when his attention was drawn to the open activities of the militant groups at a recent official briefing.

Another militant outfit, the Lashkar-e-Toiba, which claims to have the largest number of mujahideen in Kargil and Drass, said it had started mobilising youth for the fighting at its 2200 guerrilla camps across Pakistan.

``We have started mobilising trained youths from all over Pakistan for going to Kargil and Drass,'' a Lashkar spokesman told PTI. The Harkatul Mujahideen (formerly the Harkatul Ansar which was declared a terrorist organisation by the United States) and the Al-Badr Mujahideen have also said they were sending their activists to fight in Kashmir.