A Reuters reporter saw police detain Alexei Navalny on Moscow's Tverskaya Street and put him in a police truck.
Miami's Little Havana has seen a spike in tourism from all over the world, as the working class neighborhood is now a cultural hot spot.
One person was killed and 15 others were wounded after several people got into an altercation and one of them opened fire in Cincinnati, police said.
Japanese media said the students were participating in a three-day training program for members of mountaineering clubs from local seven schools.
Coming so early in President Donald Trump's term, the blow heightens worries about the chances to enact measures to boost the economy.