An officer said the advice was given during briefings for the internal Not In My Met campaign, an initiative to drive out unacceptable behaviour.
The visit was a show of defiance by Mr Putin, two days after the International Criminal Court issued a warrant for his arrest on war crimes charges.
Russia annexed Crimea from Ukraine in 2014, a move that most of the world considered illegal.
The head of the Kyiv city administration, Serhii Popko, said Ukrainian air defences shot down all drones heading for the Ukrainian capital.
It remains unclear whether North Korea has developed nuclear bombs small enough to fit on its long-range rockets.
Website The Undeniable Street View was launched on the one-year anniversary of Russia invading Ukraine.
The Kremlin said the incident proved direct US involvement in the Ukraine conflict while US officials said it showed Russia’s aggressive behaviour.
Bakhmut is a key target of Moscow’s campaign in eastern Ukraine, which has resulted in staggering casualties.
The missile barrage hit as Russia pushed its advance in Ukraine’s eastern stronghold of Bakhmut.
Ukrainian officials said residential buildings were hit but did not immediately say if there were casualties.
It comes a week after it was suggested Ukraine could retreat from Bakhmut.
Kristofer Thomas Kearney, 38, was allegedly a fitness guru for the group.
Recent drone footage shows the scale of devastation in the city, while Volodymyr Zelensky has described it as “destroyed”.
One drone crashed just 60 miles away from Moscow, according to local authorities.
The move is aimed at ending Syria’s political isolation since 2011.
