Indian and Pakistani troops exchanged fire across their disputed border in Kashmir on Tuesday, two days after a deadly raid on an army base that New Delhi blamed on Pakistan-based militants. Eighteen soldiers died in Sunday's attack, which was the worst of its kind to hit the divided Himalayan region in more than a decade and has increased hostility between the nuclear-armed neighbors. Meanwhile, the Organization of Islamic Cooperation (OIC) has expressed its concern over the recent incidents in the Indian administered state of Jammu and Kashmir. The OIC General Secretary General Iyad Madani who participated in a OIC Contact Group meeting on the sidelines of the UN General Assembly, in New York, urged the government of India for peaceful settlement of the dispute. Indian army spokesman Colonel Rajesh Kalia said there had been a "ceasefire violation" near Uri, where Sunday's attack took place, but gave no details. Uri is near the Line of Control (LoC) which divides the disputed territory. "Small-arms exchange of fire is on in the area," a senior police officer said on condition of anonymity. Separately, Kalia said troops in the same area had blocked an attempt by suspected militants to cross the LoC into Indian-administered Kashmir. "A group of 10-12 terrorists attempted to infiltrate the Uri sector. They were intercepted and the infiltration bid was foiled," he said. The Press Trust of India news agency said 10 suspected militants had been killed in the incident but this could not immediately be confirmed. India regularly accuses its arch-rival of arming and sending rebels across the heavily militarized border that divides Kashmir between the two countries, to launch attacks on its forces. Occasional violations of a 2003 ceasefire between the nuclear-armed rivals are not uncommon. The last was reported on September 6 this year and caused no casualties. Tuesday's exchange was the first since Sunday's attack, which the Indian army has blamed on Pakistan-based militant group Jaish-e-Mohammad. The same group was implicated in an audacious assault on an Indian air force base in Pathankot in the northern state of Punjab in January. It left seven soldiers dead and dashed hopes of a revival of peace talks, which have been on ice ever since. The death toll from Sunday's attack in which gunmen hurling grenades stormed a base was particularly high at 18, and Prime Minister Narendra Modi has vowed to punish those responsible. Modi promised during his election campaign to take a hard line over Kashmir and has faced calls from army veterans — and even some in his own party — for military action against Pakistan. On Sunday Home Minister Rajnath Singh accused Pakistan of "continued and direct support to terrorism and terrorist groups" and called for it to be internationally isolated. — Agencies