At least four people are reported to have been injured in a blast at a market in southern Moscow.
The explosion happened at the entrance to the market area near Prazhskaya metro station.
An official told Interfax news agency the blast was accidental and was linked to fireworks stored inside a stall selling underwear.
"Four women who were near the stall suffered wounds and burns, according to initial reports," the official said.
Correspondents say blasts and attacks in Moscow and other cities are often linked to criminal gangs.