Air strikes by a Saudi-led Arab alliance shook Yemen’s capital Sanaa on Wednesday, mainly targeting military bases aligned with the dominant Houthi group, residents said. Houthi officials said there were casualties but gave no further details. Locals saw ambulances racing to the scene. “The … blasts made me jump out of bed,” one man who identified himself as Assem said by phone. Residents said the war planes launched at least ten strikes north of Sanaa, causing massive explosions.