In December 2009, a warrant for Livni's arrest was understood to have been issued by a British court, following an application by lawyers acting for Palestinian victims of Operation Cast Lead. The warrant focused on Livni's role in Israel's war against Hamas-run Gaza earlier in the year, and was withdrawn after her visit was canceled. For several years, Palestinian activists have made largely unsuccessful attempts to prosecute Israeli officials in European courts under universal jurisdiction. The warrant was issued on 12 December and revoked on 14 December 2009, after it was revealed that Livni had not entered British territory.