ISLAMABAD, Pakistan — Prime Minister Imran Khan of Pakistan intensified his criticism of India on Wednesday over its Kashmir crackdown, saying he would no longer seek dialogue with Indian officials and raising the threat of a military escalation between the nuclear-armed neighbors.

In an interview with The New York Times, Mr. Khan complained bitterly about what he described as repeated rebuffs from Prime Minister Narendra Modi of India at his entreaties for communication, both before and after the Aug. 5 crackdown on the disputed territory of Kashmir.

“There is no point in talking to them. I mean, I have done all the talking. Unfortunately, now when I look back, all the overtures that I was making for peace and dialogue, I think they took it for appeasement,” Mr. Khan said during the interview, at the prime minister’s office in Islamabad. “There is nothing more that we can do.”