Turkmenistan's Foreign Ministry said in a statement today that Iran's failure to make payments in a timely fashion hindered Turkmenistan's ability to operate its gas transportation infrastructure.
Gas deliveries were halted on January 1.
Turkmenistan has been exporting gas to Iran under an agreement signed two decades ago, but occasionally raises its prices during the winter.
In 2006, it suspended shipments and demanded a nine-fold price increase. Iran eventually accepted the higher prices for a short period.