SANAA — Four car bombs that struck mosques in Sanaa and the headquarters of Yemen’s dominant Houthi movement on Wednesday killed two people and wounded 60 others, a medical source told state news agency Saba on Thursday.

Coming on the eve of the Muslim holy month of Ramadan, the bombings were claimed by “Islamic State” and contributed to a sense of fear in the capital, which was again hit by air strikes targeting Houthi-allied military sites on Thursday.

A Saudi-led coalition has been launching air raids against the Iran-allied Houthis for almost three months.

United Nations-backed peace talks in Geneva are struggling to bring together rival Houthi and government delegations.

Delegates reported that little progress had been made toward a hoped-for ceasefire and talks were due to conclude on Saturday.

A humanitarian crisis continues throughout the country as many areas are caught in clashes between the warring sides. A near blockade imposed by the coalition have cut off supplies of food, fuel and medicine.

Medical sources in the frontline southern city of Aden said around 20 people, including a doctor, died of dengue fever in the Crater district on Wednesday, amid a spreading outbreak caused by poor sanitation and lack of water.

More than 2,600 civilians and combatants have been killed since the conflict began in late March.