Soleimani's killing marks a dramatic escalation in the regional "shadow war" between Iran and the United States and its allies, principally Israel and Saudi Arabia, which could quickly ratchet up tit-for-tat attacks. Iran's Supreme Leader Ayatollah Ali Khamenei vowed harsh revenge.

from Times of India https://timesofindia.indiatimes.com/world/middle-east/iran-vows-harsh-revenge-after-us-airstrike-kills-iranian-gen-qassem-soleimani/articleshow/73081913.cms