Look like Russia can still rely upon some support from local Ukrainians to help destabilizing the situation in their occupied cities and towns.
New mayor installed in Russia-controlled Melitopol after the Ukrainian city's elected mayor was detained
From CNN's Paul P. Murphy and Josh Pennington
The Zaporozhye regional administration says a new mayor has been installed in the Ukrainian city of Melitopol, which is under Russian military control, after the elected mayor was detained on Friday.
Ivan Fedorov, the elected mayor of Melitopol, was detained by armed men on Friday and accused of terrorism offenses by the prosecutor's office for the separatist Russia-backed Luhansk region.
The newly installed mayor is Galina Danilchenko, a former member of the city council, according to a statement on the Zaporozhye regional administration website.
Danilchenko, who was not elected by the people, was introduced as the acting mayor on local TV, the statement said.
In her televised statement, which was posted by the administration on Telegram, Danilchenko said her "main task is to take all necessary steps to get the city back to normal."
She claimed there were people still in Melitopol who would try to destabilize "the situation and provoke a reaction of bad behavior."
"I ask you to keep your wits about you and not to give in to these provocations," Danilchenko said. "I appeal to the deputies, elected by the people, on all levels. Since you were elected by the people, it is your duty to care about the well-being of your citizens."
Danilchenko proposed the creation of a "People's Choice Committee" to "solve all the critical issues for Melitopol and the Melitopol region."
Russian military planes are flying an average of 200 sorties per day, compared to only about 10 per day flown by Ukraine, according to the official.
Much of the airspace above Ukraine is heavily guarded by both Ukrainian and Russian surface-to-air missiles, making air operations risky for both sides.
But Russian aircraft don't have to enter Ukrainian airspace to do damage.
"You can launch cruise missiles from aircraft from a great distance away. And if your target is relatively close, you don't need to enter the airspace," the official said.
For the first time, the official gave details on the total number of functioning Ukrainian fighter jets and how much they're being used.
"They have 56 available to them now, fully operational, and they're only flying them five to 10 hours a day," the official said.