The official said Thursday the suspects were detained in the Yemeni capital a day earlier, hours after assailants shot a rocket at a British convoy.

Four people were wounded in the attack, including an embassy official, although Britain’s deputy chief of mission was unharmed.

The official says the attack highlights the Yemeni security forces’ troubles in securing the capital, especially the troubled Noqoum neighborhood, where the attack took place.

The official spoke on condition of anonymity because he wasn’t authorized to speak to the media.