Abu Dhabi National Energy Co (TAQA)
The official, who declined to be named under briefing rules, did not give further details of the decision.
In March, TAQA said a consortium led by it had agreed to buy the two power plants from Jaiprakash Power Ventures
State-run TAQA, with 51% of the consortium, was to control the operations and management of both plants.
PSP Investments, one of Canada's largest institutional investors, would own 39% and an infrastructure fund run by India's IDFC Alternatives was to hold 10%.