A blast at the entrance of a residential building in Monaco resulted in three people being injured, two of them critically, the authorities said.

What do we know so far?

Among those injured are Ukrainian oligarch Vadym Yermolaiev, AFP news agency reported. In addition, a woman was also wounded; Both she and Yermolaiev are in life-threatening condition,

A 13-year-old who was "likely related to the couple" was also injured, Monaco's Minister of State Christophe Mirmand said, with four other people suffering from shock and cuts as a result of broken windows.

Mirmand described the incident as a "deliberate explosion."