All US military bases have been placed on heightened alert under "Bravo" threat level, an ABC source reports.

This signals an increased risk of attack.

The US and Israel have been attacking Iranian territory since February 28, resulting in destruction and casualties. In response, Iran has been launching missile strikes against Israel and US military bases in the region. Iran's Supreme Leader Ayatollah Ali Seyyed Khamenei and other senior officials were also killed in the Israeli-American attack.

On March 2, Hezbollah also entered the war against Israel. Israel announced the launch of an offensive operation against the movement.