Three crew members were killed in a suspected attack by Iran-backed Houthis on a small cargo vessel in the Bab el-Mandeb strait on Tuesday while a container ship was hit by a missile off Pakistan in a suspected U.S. attack, sources said. Read more: Red Sea War Insurance Costs Rise After Houthi Blockade, Sources SayYemeni forces then came under fire, UK maritime risk management group Vanguard said. The Houthis declared a maritime embargo against Saudi Arabia in the Red Sea on July 20 in response to what they described as a Saudi siege. The incident occurred while the ship was at anchor northeast of Perim Island, Yemen, British maritime security group Ambrey said. Attack off PakistanThe Panama-flagged container ship Vela Nova was struck by a missile in an attack off Pakistan while sailing into the Gulf of Oman, maritime security sources told Reuters.