India, Oct. 13 -- The Houthis in Yemen have repeatedly targeted Saudi airports and energy facilities despite the kingdom's advanced military capabilities, raising questions about the group's missile arsenal, attack tactics and the availability of air-defence interceptors.

The attacks intensified over the weekend, when a strike on King Khalid International Airport in Riyadh killed at least 13 people and injured more than 300, according to reports from Saudi Arabia. An Indian national injured in the October 10 attack later died, the Indian Embassy in Riyadh said. A further attack on Sunday killed one person at the airport, while Saudi authorities reported additional incoming missiles and drones on Monday.

Saudi Arabia said its air-defence...