The phrase "authorities completed" is not correct and lacks clarity in written English.
It may be intended to convey that authorities have finished a task or process, but it requires additional context to be meaningful.
Example: "The authorities completed the investigation into the incident last week."
Alternatives: "authorities finalized" or "authorities concluded".
In 1995, election authorities completed their count by midnight of election day and released total unofficial results the next day.
Mr. Field's guilty plea in New Hampshire was sealed until today while Federal authorities completed the undercover operation.
Many left as the result of the government's phasing out of primary care trusts and strategic health authorities, completed last April.
Authorities completed an investigation into HSBC Suisse for alleged tax-related offences earlier this year, turning over a file to prosecutors to make a formal decision.
The federal authorities completed preparations today to clear demonstrators later this week from a Navy range on Vieques, a small island off Puerto Rico, even as F.B.I. officials continued to express misgivings about the operation they will lead.
In 2015, the federal authorities completed formal refurbishments on the mosque's infrastructure.
We will know the true reasons when the Civil Aviation Authority in coordination with Russian authorities completes its investigation.
"We will know the true reasons [of the crash] when the civil aviation authority in coordination with the Russian authorities completes its investigation," he said.
Sophomores and freshmen who failed may have to retake the test, although their scores may be adjusted upward after authorities complete an investigation.
And she said there had been an increase in the number of council houses, with local authorities completing 1,206 new homes in the year to September 2012 - the highest number since 1990.
In February India's census authority completed a year-long effort of tallying and biometrically registering its 1.2 billion residents.
