At least twenty people are dead and dozens wounded as a suicide bomber blew himself up at the entrance of a mosque in Yemen during evening prayers. Shortly after, a car bomb went off near the entrance, according to The New York Times. Relief workers at the scene said the death toll could increase. The car bombing went off as people were carrying the wounded outside after the first bombing, adding to the death count.

Yemen's local affiliate of the Islamic State claimed responsibility for the bombings, taking to social media for their message. The bombings are said to be revenge against the Houthis who hold Sana, capturing it last September.

The Saudi Arabia-led military coalition has been fighting the Shiite rebels since March, with the United Nations estimating the conflict has killed more than 2,100 civilians, with more than 4,500 casualties in all.

Earlier today, two Red Cross workers were also killed, as part of the conflict in Yemen.  Both were Yemeni nationals returning from relief work in Northern Yemen, according to the International Business Times. The murders of the humanitarian workers were unusual as aid agencies have become critical for food and medicine in the poor country.

Last month, Red Cross closed its doors in Yemen's south as unknown gunmen stormed their office, holding the relief workers at gunpoint as they stole cash, cars and laptops, according to FOX News. The relief workers were released unharmed in that incident.