The phrase "authorities mount" is correct and usable in written English.
It can be used in contexts where authorities are increasing their efforts or actions regarding a particular issue or situation.
Example: "As the crisis escalated, authorities mount a coordinated response to ensure public safety."
Alternatives: "authorities increase" or "authorities intensify".
It also comes as authorities mount an all-out campaign to ensure stability ahead of the 60th anniversary of Communist party rule on 1 October.
Joaquin "El Chapo" Guzman, leader of Mexico's powerful Sinaloa drug cartel, is now on the run as authorities mount an immense manhunt for the criminal kingpin.
Philippine Airlines later announced its intent to serve this route as well, suggesting that Iloilo tourism authorities mount thrice-weekly charter flights to the city using PAL Airbus A320 aircraft.
Follow-up of passengers can be difficult once they leave the airport, even when public health authorities mount a vigorous response.
The authorities mounted warning notices and motion-sensitive digital cameras on trees.
Yet to the authorities' mounting alarm, Russia is drafting legislation extending eligibility for citizenship to Russian-speakers anywhere in the former Soviet Union.
What made this swim particularly difficult is that this year, of all years, local authorities mounted a large operation to remove the bodies of climbers who lost their lives on the mountain.
Last year it led to authorities mounting a raid on the world-famous Gibson guitar company over allegedly illegal Madagascan rosewood.
Egyptian and Greek defense authorities mounted a search Thursday for the missing jetliner in the Mediterranean.
Canadian authorities mounted a manhunt to find them and get the exact details of the incident, Sgt.
But since then, Egypt has witnessed the bloodiest political struggle in its modern history, with the Muslim Brotherhood trying to regain power through street protests and authorities mounting a relentless security crackdown against them.
