India, Sept. 10 -- Rescuers in Yemen pulled more bodies from the rubble Wednesday of a prison run by Iran-backed Houthi rebels that was hit in a deadly airstrike earlier this week, as an escalation between the rebels and a Saudi-led coalition threatened Yemen's fragile ceasefire.

The renewed fighting is also threatening global oil shipments as the Houthis target shipping and oil infrastructure that's helping keep oil flowing through the Red Sea while the US-Iran war has throttled shipments through the key Strait of Hormuz on the opposite side of the Arabian Peninsula.

The prison in Hazm, the Jawf provincial capital, collapsed on Monday when coalition strikes hit the area, killing at least 23 people, including the four whose bodies were ...