The Kuwaiti woman was accused of months of abuse and torture ahead of the domestic worker's killing.
The kingdom's anti-corruption watchdog said the arrests were made in connection to cases involving bribes and financial irregularities.
As the newly reshuffled cabinet convened for the first time in Aden, Prime Minister Maeen Abdulmalik repeated his accusation that Houthi militias were behind the explosions.
The decision to send the USS Nimitz home could reflect a lack of consensus on whether Iran poses a heightened threat to strike during Trump's final days.
A retrospective of our coverage of 2020's leading stories
A guide on the newly-formed Yemeni government:
The New Arab's picks for the best of Middle Eastern films and TV series from a difficult year.
Iran is marking the first anniversary of the assassination of its top military commander, General Qasem Soleimani.
Russia's foreign minister also pledged to aid Libya's Tripoli-based government.
The new power-sharing Yemeni government vowed on Thursday to bring stability after a fatal blast targeted Aden's airport.