ADEN - A Saudi-led coalition launched heavy air strikes on Yemen's main port city of Hodeidah on Friday, in an apparent resumption of military operations on the Red Sea city after the Iranian-aligned Houthi movement attacked two Saudi oil tankers. Residents said coalition warplanes had begun their bombardment after midnight, attacking a Houthi military police camp in the city center, a plastics factory north of the city, and the districts of Zubaid and al-Tahita to the south. The Houthi-run al-Masirah TV said in a series of tweets that coalition air strikes had targeted a radio station inside the city and a fishing pier. There were no immediate reports of casualties.