Since the assassination of former Yemeni President Ali Abdullah Saleh , the Houthi rebel group has killed at least 20 people and detained 49 others across the country's northern provinces, according to Yemen's official news agency, The Washington Post reported Dec. 11. Houthi fighters, which had a temporary alliance with Saleh until recently, are accused of killing him Dec. 4 as he tried to escape the capital of Sanaa. The Houthis have started to crack down on members of the former president's party, the General People's Congress. In addition, the rebel group has attempted to shut down the internet and has enforced a media blackout.