Pakistan has issued a stark warning to Yemen's Houthi rebels, declaring that any attack on Pakistani-flagged or Pakistani-owned vessels in the Red Sea will be treated as an attack on the country itself and met with a swift military response. Foreign Office spokesperson Tahir Andrabi described the threshold as a "red line" rooted in national security, while Prime Minister Shehbaz Sharif separately telephoned Saudi Crown Prince Mohammed bin Salman to condemn as "unacceptable" a Houthi strike that set a Saudi oil tanker ablaze in the Red Sea this week. The warning — among the strongest issued by any non-Arab country since the Houthis began targeting commercial shipping in late 2023 — also signals Islamabad's obligations under a mutual defence pact signed with Riyadh in September 2025, under which aggression against one party is considered aggression against the other.