An Afghan official says explosions in Kabul have killed at least four people attending a funeral reportedly attended by government officials, including members of parliament.

Najib Danish, Interior Ministry deputy spokesman, says three explosions rocked a cemetery where Sen. Alam Ezadyar's son was about to be buried. Salim Ezadyar was killed during a protest Friday attended by hundreds in Kabul, said.

Ezadyar is deputy speaker for the upper house of the country's parliament.

More than a thousand people demonstrated Friday demanding more security in the capital following a powerful truck bomb attack in the city that killed 90 people and wounded more than 450. Officials say several were killed and wounded.