China Petroleum and Chemical Corp and ENN Energy Holdings Ltd, joint bidders for China Gas Holdings Ltd, extended the deadline for the acquisition to July 6 as they await regulatory approval.

ENN Energy also postponed distributing a circular to shareholders on the planned deal to no later than May 31, the bidders said in a Hong Kong stock exchange filing on Monday. ENN said on March 19 it would dispatch a circular on the HK$15.3 billion ($2 billion) bid by Monday.