Middle East crisis live: Houthis target another US ship in Gulf of Aden; US launches fifth round of strikes inside Yemen

Houthis launch new attack on the Chem Ranger ship in the Gulf of Aden; US officials say the missiles hit the water causing no damage

While Iran has taken low-level action against Balochistan in the past, Tuesday's strikes were unusually heavy-handed and Thursday's retaliatory bombings were the first time that Pakistan has responded with comprehensive military action against its neighbour.

Sources in Islamabad said the decision was taken after heavy political and military pressure on the top army leadership to show strength against Tehran.