A direct flight to Tehran the capital of Iran was launched from Almaty airport.
Iran has reached an agreement with Boeing for purchase of 100 aircrafts, said Ali Abedzadeh.
The accident took place early in the morning during the excavation works.
Kazakhstan opens direct flights to Iran. Flight Tehran-Astana will be launched in late June.
More than 50 agreements worth $1 billion have been signed during the Kazakh-Iranian Business Council, which was held in Tehran.
Tehran is to host Kazakh-Iranian Business Forum at the beginning of February
The US says Iran has taken a "significant step" towards meeting its nuclear commitments, by sending a large quantity of uranium abroad.