A Russian general was killed by a bomb planted in a scooter on a Moscow street on Tuesday, the Russian authorities said, in one of the most brazen assassinations since Russia’s full-scale invasion of Ukraine nearly three years ago.

The general, Igor Kirillov, died along with an aide after an explosive device planted in a scooter was detonated on Tuesday morning near the entryway to a residential building on Ryazansky Avenue in Moscow, Russia’s Investigative Committee, a law enforcement agency, said in a statement.

General Kirillov was the head of Russia’s radioactive, chemical and biological defense forces.

This is a developing story.