The United States resumed strikes on Iran, saying it targeted dozens of sites linked to the Islamic Revolutionary Guard Corps in retaliation for an attack on American troops. The move marked a renewed escalation after several days of relative calm.

Washington said the operation hit a broad set of Iran-related targets, underscoring how quickly tensions have sharpened again. The latest exchange adds to concerns that the confrontation could expand beyond isolated attacks and pull the region back toward a larger conflict.

The wider danger was highlighted by reports from Kuwait, where an Iranian strike hit a Chinese firm's building in the north of the country on Thursday morning. Kuwait's military said the structure was severely damaged and that one worker was killed.

Taken together, the U.S. strikes on Iran and the deadly incident in Kuwait show how the violence is affecting multiple countries at once. With fresh flare-ups following a brief lull, fears of a return to all-out war in the Middle East have risen again.