Will Putin react, as he and Medvedev have stated in past statements, should Crimea be attacked?

A drone strike has led to a massive fire at a fuel storage facility in the Crimean port city of Sevastopol, its governor Mikhail Razvozhaev has said.
The fire was still burning, but it had been contained as firefighters reached the site, and no one was injured, Razvozhaev said on Saturday.
"According to preliminary information, it was caused by a drone strike," he added on the messaging app Telegram.
In a video posted on his Telegram channel, he said the four fuel tanks that were hit, are practically burnt out already.
The attack comes five days after Russian officials said they had fended off a drone attack by the Ukrainian military in the same area.