UPDATE 2-Mexico awards 16 of 35 blocks in final oil auction before election
March 27, 2018 at 17:04 PM EDT
MEXICO CITY, March 27 (Reuters) - Mexico awarded just under half of the 35 shallow-water blocks it tendered on Tuesday, in an auction muddied by the promises of the presidential frontrunner to review contracts awarded under a historic energy opening if he wins the July 1 election.