The killing of Iranian general Qassem Soleimani in a U.S. airstrike on Jan. 2 may bring about cyber warfare, the U.S. government has warned in a security bulletin.

The advisory, issued Saturday, notes Iran, in a retaliatory move, could strike critical infrastructures—such as power grids and oil refineries—through a cyber-attack. The purpose of the bulletin is to share general trends regarding threats of terrorism—its set to expire Jan. 18.

Jaclyn Jaeger is a freelance contributor to Compliance Week after working for the company for 15 years. She writes on a wide variety of topics, including ethics and compliance, risk management, legal,...