The missile attacks come amid an escalation in fighting between the Iran-backed group and Saudi Arabia, which backs Yemen's government. Three Saudi citizens have been killed attacks on Riyadh airport that were claimed by Houthi rebels, marking a significant escalation in the conflict. Key points and original sources are listed below.

• The missile attacks come amid an escalation in fighting between the Iran-backed group and Saudi Arabia, which backs Yemen's government.S1

• Three Saudi citizens have been killed attacks on Riyadh airport that were claimed by Houthi rebels, marking a significant escalation in the conflict.S2

• By Timour Azhari and Tala RamadanRIYADH/DUBAI, Oct 9 (Reuters) - Thursday's attacks on Riyadh airport killed three people, Saudi authorities said on Friday, as Yemen's Houthi group stepped up missile strikes on the kingdom and tried to shut down its airspace i...S3

• Houthi strikes on Riyadh airport killed three Saudis as war escalatesS4