ISLAMABAD, April 28 (Reuters) - Pakistan's defence minister said on Monday that a military incursion by neighbouring India was imminent in the aftermath of a deadly militant attack on tourists in Kashmir last week, as tensions rise between the two nuclear-armed nations. The militant attack killed 26 people and triggered outrage in Hindu-majority India, along with calls for action against Muslim-majority Pakistan. India accuses Pakistan of backing militancy in Kashmir, a region both claim and have fought two wars over. "We have reinforced our forces because it is something which is imminent now. So in that situation some strategic decisions...