Shah Deniz gas pipeline flow halted by explosion in Turkey

The officials told Reuters that gas flow had been halted on Aug. 3 due to maintenance and had only resumed on Aug. 23 but had not yet reached capacity before Monday's blast.

"Last night there was an explosion in the pipeline on the Turkish side and the flow stopped," one senior official said.

Another official said damage assessment was set to begin on Tuesday and that it would not be clear when the gas flow would resume until after the assessment.

An explosion had previously hit the pipeline on Aug. 4, after the flow had already been suspended for maintenance. That was days after an attack by Kurdistan Workers Party (PKK) militants halted the flow in a pipeline carrying crude oil to Turkey from Iraq.

Shah Deniz, Azerbaijan's biggest gas field, is being developed by partners including British oil major BP, Azeri state energy company SOCAR and others.

Turkey has witnessed a surge in violence in recent weeks with the PKK targeting Turkish security forces and infrastructure while Turkey has struck PKK camps in northern Iraq.