The Ukrainian government says Russia has spread "a large amount of misinformation, manipulation and fakes" to sow panic among Ukrainians and foreigners.
The Biden administration says about 600 protesters are still imprisoned for taking part in last summer's protests, prompting the travel bans.
Two Molotov cocktails hit the Cuban embassy, which caused a fire late on Monday, but no one was injured during the incident.
Officials hope to increase medicine supplies, while work is being done on the electricity system to enhance stability, Prime Minister Manuel Marrero said.
Miguel Díaz-Canel said "we have to gain experience" from the protests that have rocked the Caribbean island.
"I hold the government responsible for anything that may happen to me," Dina Stars told Spanish TV as she cut short her live interview.
"We hope that in 2021, President Biden can fix what Kennedy broke in 1961," Gutierrez-Boronat told Newsweek in an interview Monday.
Thousands took to the streets in downtown Havana, before reports emerged of internet and cell phone service being lost across Cuba.
Thousands protested in Havana, as well as San Antonio de los Baños and Palma Soriano, on July 11 to demand President Miguel Diaz-Canel step down.
"Portraits, slogans and posters form the core of a message for a socialist country," says Yang Moo-jin, a professor at the University of North Korean Studies.
Presidential Miguel Diaz-Canel faces no competition, and neither does the man running as his deputy, Salvador Valdés Mesa.
Cuba's Castro chapter is coming to a close.