 On 30 April a NATO airstrike killed Gaddafi's sixth son and three of his grandsons in Tripoli.This Western military intervention was criticized by various leftist governments, including those that had criticized Gaddafi's response to the protests, because they regarded it as an imperialist attempt to secure control of Libya's resources.In June, the ICC issued arrest warrants for Gaddafi, his son Saif al-Islam, and his brother-in-law Abdullah Senussi, head of state security, for charges concerning crimes against humanity.