The 1989 Battle of Guelta Zemmur took part on 7 October 1989, when POLISARIO guerrillas commanded by Lahbib Ayub attacked the Moroccan Wall on the Guelta Zemmur section. The attack was the bigger battle in the war since 1988, as the Polisario Front saw the negotiations with Morocco on a dead end. Hassan II reacted to the Sahrawi offensive denying a second encounter with the POLISARIO leaders. According to the Spanish newspaper El País, at least a hundred soldiers from both sides were killed in the clashes.