Israeli forces unleashed a series of strikes on the Yemeni capital Sanaa and the western city of Hodeidah on Thursday, killing at least six people and injuring dozens more, the Houthi militant group said in a statement.

The head of the World Health Organization (WHO) and other UN staff were at Yemen's international airport in Sanaa on Thursday during Israeli air strikes which are reported to have killed at least six people. WHO Director General Tedros Adhanom Ghebreyesus said they were about to board a plane when the attacks began.

General, António Guterres, condemned Thursday the recent escalation of violence between Yemen and Israel, which resulted in the deaths of at least three people and injured dozens.