A suicide bomber detonated explosives near the entrance of the Russian embassy in Kabul on Monday, resulting in several casualties, according to Afghan police.
The bomber was shot and killed by Taliban guards while approaching the gates of the embassy, but explosives were still reportedly detonated.
"The suicide attacker before reaching the target, was recognized and shot by Russian embassy [Taliban] guards," Mawlawi Sabir, the head of the police district where the attack took place, told Reuters.
The Russian Foreign Ministry said two of its embassy staff were killed by the explosion.
The ministry said in a statement that the explosion occurred "in the immediate vicinity of the entrance to the consular section of the Russian Embassy" in Kabul.
"An unknown militant set off an explosive device," the statement read. "As a result of the attack, two members of the diplomatic mission were killed, and there are also victims among Afghan citizens."
At least one civilian was killed and at least 10 others were injured in the attack, Kabul police chief spokesman Khalid Zadran said.
Zadran said the incident is under investigation.
State news agency RIA Novosti reported that the explosion took place when a Russian diplomat came out to the people waiting in line outside to call out the names of Visa candidates.
There was no immediate claim of responsibility for the attack.
Russia is one of the few countries to have maintained an embassy in Kabul after the Taliban took control of Afghanistan last year amid a U.S. evacuation.
Moscow does not officially recognize the Taliban as the government of Afghanistan, but Russian officials have been in talks over an agreement to supply gasoline and other commodities.
The Associated Press and Reuters contributed to this report.