A fourth Bahraini soldier has died of wounds from an attack earlier this week by Yemen's Houthi rebels targeted forces patrolling Saudi Arabia's southern border, the island kingdom said late Friday. The state-run Bahrain News Agency, citing a military statement, identified the slain soldier as 1st Lt. Hamad Khalifa al-Kubaisi. Al-Kubaisi “succumbed to the injuries he had suffered as a result of the Houthi act of aggression last Monday, while performing his sacred patriotic duties defending the southern borders of Saudi Arabia,” the statement said.