An explosion at a restaurant in Moscow killed three people and injured 21 others on Saturday, according to Russian state media reports citing the national anti-terrorism committee. Officials said the incident was a bombing, not an accidental blast.

Authorities said one of the dead was a woman who was carrying a homemade explosive. The brief official account suggests the device detonated at the restaurant, leaving more than 20 other people with injuries of varying severity.

The bombing designation points to an active security investigation into how the homemade explosive was assembled, brought to the venue and set off. Early reports did not clarify the intended target or say whether any other suspects were being sought.

The Moscow restaurant bombing is likely to intensify scrutiny of public venue security as investigators work to establish the full sequence of events. For now, the confirmed toll stands at three killed and 21 wounded.