SANAA, Yemen—Yemeni security officials say thousands have protested in the capital against "excesses" by security forces, calling for the overthrow of the president and national security apparatus.


Also on Thursday, Human Rights Watch called on the government to thoroughly investigate Sunday's incident and hold the culprits responsible.


Hawthi leader Ali al-Bokhayti said security forces had handled the protesters as if they were armed, a charge he denied, saying that "all the victims were from one side."