Kabul, Jan 20: A heavy explosion was heard on Wednesday near the Russian embassy in Kabul capital city of Afghanistan. Prelimiry reports indicate a vehicle-borne improvised explosive device (IED) was detoted in the vicinity of Dar-ul-Aman area close to the embassy compound, Khaama Press reported. The type of the explosion, for which no group has claimed responsibility, was yet to be ascertained. (IANS)