Dhaka, May 8 -- Pakistan has vowed to avenge the deaths of 31 people killed in Indian missile strikes that New Delhi described as retaliation for a deadly assault on Indian tourists in Kashmir last month.

Calling the strikes an "act of war," Pakistan claimed it downed several Indian fighter jets and warned of consequences. The missile attacks hit areas in Pakistan-administered Kashmir and Punjab province, killing civilians including women and children, Pakistan's military said, according to an AP report.

India's Defense Ministry said the strikes targeted at least nine sites "where terrorist attacks against India have been planned." Among the structures hit were two mosques.

Pakistani Prime Minister Shehbaz Sharif said his country would...