Terrorist groups attacked a helicopter over Nubl city with educational cadres onboard, causing the helicopter to crash, an official source said. The source added that the educational cadres were carrying exam papers for basic education certificate to the students of Nubl and al-Zahraa cities who could not apply for the exams on time, SANA reported. The source pointed out that the terrorist attack caused the death of seven civil employees in addition to the helicopter crew. The source added that in an expression of the Education Ministry\'s persistence to face the obscurantist thought of terrorism, the Education Directorate contacted the authorities concerned and managed to conduct examinations on time.