Saudi airstrikes kill 40 at refugee camp , Yemen 's Defense Ministry says . Egyptian warships shell road leading to key port city , said clashes with Yemen 's Southern Movement . Yemen 's foreign minister says he expects coalition coalition troops to arrive within hours .
Saudi airstrikes kill 40 at refugee camp , Yemen 's Defense Ministry says . Egyptian warships shell road leading to key port city , said official with Yemen 's Southern Movement . Yemen 's foreign minister says he expects coalition ground troops to arrive within days .