Saudi Arabia says all options are open including ground operations to stop mortar attacks on its border towns by Yemen's Houthi militants.

This was stated by the Saudi-led coalition spokesman Brigadier General Ahmed Asseri while talking to al-Arabiya TV.

Meanwhile, US Secretary of State John Kerry has arrived in Riyadh to hold negotiations with Saudi authorities on the Yemen situation.

He will also discuss the scheduled summit with them which will be held on Wednesday in Washington.

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