Israel and Iran have begun a new round of attacks, as the conflict between the two heavily armed rivals enters its fourth day.

The IDF spokesperson also confirmed it struck Yemen Saturday night, targeting a Houthi leader, but cannot confirm whether the strike was successful. There were also projectiles fired from Yemen overnight toward Israel, according to the spokesperson.

Iran has launched retaliatory missile strikes on Israel, killing at least three people and wounding dozens, after a series of blistering Israeli attacks on the heart of Iran’s nuclear program and its armed forces.