India, Oct. 8 -- Several explosions were heard across Saudi Arabia's capital Riyadh on Thursday, with diplomats reportedly taking shelter in their embassies and international schools also taking safety measures.

Tensions escalated in the Saudi capital on Thursday after blasts were heard and Yemen's Houthi's claims attacks. The explosions came hours after Yemen's Houthi group claimed it had attacked King Khalid International Airport in Riyadh with a ballistic missile. The claim could not be independently verified.

Diplomats stationed in the Saudi capital had been instructed to shelter in their respective embassies, while residents said international schools had taken precautionary measures. At least one school moved children into a basem...