- 'JUST THE BEGINNING'
Although Ukraine did not directly claim responsibility for the attack, multiple statements by top Ukrainian officials pointed to the possibility.
Ukraine's senior presidential adviser Mykhailo Podolyak said what happened on the bridge is just "the beginning."
"Everything illegal must be destroyed, everything stolen must be returned to Ukraine, everything occupied by Russia must be expelled," Podolyak said in a tweet.
Ukraine's National Security and Defense Council Secretary Oleksiy Danilov shared a video split in two parts, with one side displaying the fire on the bridge and the other side playing Marilyn Monroe's famous "Happy Birthday Mr. President" song.
"Putin should be happy. Not everyone gets such an expensive present on their birthday," a Ukrainian official told the New York Times speaking on the condition of anonymity.
On Friday, the Russian president turned 70.