MEG Energy headquarters in Calgary. A shareholder vote on a takeover of the oilsands producer was delayed until Nov. 6. Photo by Gavin John/Bloomberg

Questions raised about a deal struck between former rival suitors for MEG Energy Corp. has resulted in another last-minute postponement of a shareholder vote on a takeover offer for the oilsands producer.

A vote to approve Cenovus Energy Inc. ‘s $8.6-billion acquisition was delayed twice Thursday before MEG’s board announced it would be postponed for another week the third postponement since the friendly deal was announced.

Citing a “regulatory inquiry” that had come in late Wednesday, MEG chair James McFarland said the company and Cenovus had agreed to reschedule the vote until Nov. 6.

He said the additional time would allow MEG to

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