Several Egyptian naval vessels were sunk. The Palestinian PLO suffered 1,828 killed and 2,500 were captured. Jordan's intervention on behalf of the PLO during the Battle of Karameh cost it 40–84 killed and 108–250 injured. An estimated 58 Soviet military personnel were killed and four to five Soviet-piloted MiG-21 aircraft were shot down in aerial combat. Syrian casualties are unknown but an armored raid by Israeli forces against Syrian positions in June 1970 led to "hundreds of Syrian casualties." Cuban forces, which were deployed on the Syrian front, were estimated to have lost 180 dead and 250 wounded.