At least 31 people were killed and dozens wounded in five simultaneous blasts at Shiite mosques and a house in the rebel-held Yemeni capital, medics and witnesses said.

Two car bombs targeted mosques, while a third hit the house of the head of the Huthi rebels' politburo, Saleh al-Sammad.

Explosive devices also went off at two other mosques, with all the attacks timed to coincide with Muslim sunset prayers.