Suspected US airstrikes in Yemen's rebel-held capital have killed at least six people and wounded 30, according to the Houthi rebels. The airstrikes are part of a monthlong intense campaign by the US targeting the rebels over their attacks on shipping in the Middle East. The campaign has killed over 120 people so far. The US military has not acknowledged the strikes or provided information on the targets hit. The Houthis also claimed to have shot down an American MQ-9 Reaper drone.