Israel has carried out its first strikes against Houthi targets in Yemen since the Israel-Iran ceasefire, attacking ports and a power plant around midnight local time Sunday night into Monday morning.

The attack on the Magic Seas, a dry bulk carrier owned by Greece’s Stem Shipping, was the first on a commercial vessel since December by the group, which is backed by Iran. It was followed almost immediately by Israeli strikes on a number of Houthi-held ports in Yemen.

The Houthis then responded with an apparent missile attack on Israel. The Israeli military said that it attempted to intercept the two missiles launched by the Houthis, but they appeared to make impact, though no injuries have been reported. Sirens sounded in the West Bank and along the Dead Sea.