According to Ağca, the plan was for him and the back-up gunman Oral Çelik to open fire in St. Peter's Square and escape to the Bulgarian embassy under the cover of the panic generated by a small explosion. On 13 May they sat in the square, writing postcards and waiting for the Pope to arrive. When the Pope passed them, Ağca fired several shots and wounded him, but was grabbed by spectators and Vatican security chief Camillo Cibin. This prevented him from finishing the assassination or escaping. Four bullets hit John Paul II, two of them lodging in his lower intestine, the others hitting his left hand and right arm. Two bystanders were also hit. Çelik panicked and fled without setting off his bomb or opening fire. The Pope survived the assassination attempt.