At least 13 people died in Iran's capital Tehran on Tuesday when a gas leak in a clinic caused an explosion.
The explosion injured six others, Tehran Emergency Department head Peyman Saberian told the semi-official Fars News Agency.
Also, Hamid Reza Goudarzi, deputy governor of Tehran, said in a statement to state television that a gas leak had caused the explosion.
The street that the explosion took place was closed to traffic and strict security measures were taken at the scene.
*Writing by Havva Kara Aydin