ISLAMABAD, May 26 (AFP) - Pakistan's military is "monitoring" the situation arising from Indian air strikes close to the Line of Control (LoC) borderline in the disputed Kashmir region, a defence source said Wednesday. There was no immediate official reaction to Wednesday's action by the Indian air force against alleged Moslem militants in the Kargil sector in Kashmir, but Pakistan has previously warned such strikes would escalate tension. "We are monitoring the situation," a defence official told AFP, after an Indian air force spokesman said air strikes were carried out to flush out alleged Pakistan-backed guerrillas in northern Kargil region. A Pakistani military spokesman said last week Pakistan was fully alert to the buildup of Indian army and the presence of fighter aircraft in Kashmir. Any violation of the LoC by Indian fighter aircraft would be taken "very seriously", the spokesman said. Pakistan says Indian troops have been engaged in cross-border artillery shelling, forcing its forces to retaliate. The Indian side has blamed Pakistan, saying its troops had been giving covering fire to help alleged infiltrators in the Kargil sector. India holds two-thirds of the Himalayan state, with the remaining third in Pakistan control. The dispute over Kashmir has caused two of the three wars between the South Asian neighbours since their independence in 1947. The Indian air force spokesman said it was the first time India had resorted to aerial bombardment in Kargil, where according to New Delhi some 400 Moslem guerrillas have sneaked in. India says the Moslem rebels, including Taliban from Afghanistan, stormed the 14,036-square kilometre (5,398-square mile) Kargil zone of Kashmir under cover of Pakistani shelling. India moved in 12,000 soldiers on May 10 to dislodge the fighters from mountain ridges amid fears the heights could be used to guide Pakistani gunners to attack the key Srinagar-Leh road. India says a quarter of the intruders have been killed in the Kargil mountaneous region, some 100 kilometres (62 miles) northeast of Srinagar, summer capital of the Indian-controlled Kashmir.  