ISTANBUL—Two Turkish soldiers were killed and two others were wounded in an attack in northern Syria, Turkey’s defense ministry said Sunday. The ministry wrote on Twitter that a Turkish armored vehicle was attacked. The assault occurred Saturday in the so-called Euphrates Shield area, which consists of a region between the Turkish border and northern Aleppo, including the towns of Jarablus and al-Bab. The ministry said it struck “terror” targets in retaliation. The Britain-based Syrian Observatory for Human Rights said that dozens of Turkish rockets were fired at northern Aleppo, with no reports of injuries. Turkey, however, said seven fighters were “neutralized.” The statement didn’t say who attacked the soldiers but called them “terrorists.” Turkey has been fighting the Syrian Kurdish militia People’s Protection Units, or YPG. Turkey considers them an extension of a Kurdish group which has waged a decades-long insurgency inside Turkey. Turkey launched its first cross-border operation into …