Yemen's Houthi rebels have signaled they now will limit their attacks in the Red Sea corridor to only Israeli-affiliated ships, just as a ceasefire in the Gaza Strip entered its second day Monday.

The Houthis' announcement, made in an email sent to shippers and others on Sunday, likely won't be enough to encourage global firms to reenter the route that's crucial for cargo and energy shipments moving between Asia and Europe. Their attacks have halved traffic through the region, cutting deeply into revenues for Egypt, which runs the Suez Canal linking the Red Sea to the Mediterranean.