What does soraya call to tell her Amir? What does Amir discover when he goes to give sohrab the news?

A call from Soraya awoke him; she gave the good news that Sharif would be able to get Sohrab a visa. Amir knocked on the bathroom door to tell Sohrab that all their fears were over, but he would not answer. Then Amir opened the door to the bathroom and began to scream; an ambulance took him and Sohrab to the hospital.