More than 70 people were wounded in a wave of Houthi attacks Tuesday on Saudi Arabia, authorities said, a major escalation in the renewed conflict between an important US ally and the Iranian-backed rebels in Yemen. DUBAI, Sept 8 (Reuters) - At least 73 people were injured in attacks on Saudi Arabia by Yemen's Iran-backed Houthis, the Saudi-led coalition in Yemen said on Tuesday, vowing to respond firmly to the latest outbreak of hostilities. Key points and original sources are listed below.

• More than 70 people were wounded in a wave of Houthi attacks Tuesday on Saudi Arabia, authorities said, a major escalation in the renewed conflict between an important US ally and the Iranian-backed rebels in Yemen. The attacks come after weeks of escalating c...S1

• DUBAI, Sept 8 (Reuters) - At least 73 people were injured in attacks on Saudi Arabia by Yemen's Iran-backed Houthis, the Saudi-led coalition in Yemen said on Tuesday, vowing to respond firmly to the latest outbreak of hostilities. The Houthis, who control the...S2

• Saudi Arabia has vowed to retaliate after 73 people were injured in attacks by Yemen's Iran-backed Houthis.S3