Explosion Reported Near Russian Embassy in Kabul, Afghanistan

An Afghan policeman keeps watch near the site of a blast, in an area close to the Russian Embassy in the west of the Afghan capital of Kabul on January 20. Ahmad Masood/Reuters

A deadly blast occurred on Wednesday near the Russian Embassy in downtown Kabul, Afghanistan, killing four people and wounding dozens more, according to the Afghan Interior Ministry.

Afghanistan's Tolo News reported that the rush-hour blast came from a suicide bomber on a motorcycle who targeted a civilian bus on Kabul's Darul Aman Road.

The nationalities of the dead haven't been reported, but Russian state news agency Tass said no Russian staff at the embassy have been injured.

Civilian Bus Targeted In Kabul Suicide Bombing https://t.co/tooy9opOU1 pic.twitter.com/BqlGSntcBq

— TOLOnews (@TOLOnews) January 20, 2016

No group has claimed responsibility for the attack yet.

The attack comes less than a month after a Taliban suicide bomber killed one person and wounded 33 in an attack near Kabul's airport. Among the injured were 18 children who had been studying at a nearby religious school.