Interpol, the international police organisation, is preparing to produce a Most Wanted red notice for the woman in her 30s after issuing an arrest warrant.
The woman has not yet been named publicly, but was filmed outside the Sun’s Palace – a lavish apartment block owned by Mr Yermolaiev.
She is believed to have dumped the backpack that exploded in the foyer, just before 9pm and she is thought to have been about 12 meters away when she triggered the device.
“The prime suspect was identified by a witness,” said an investigating source.
“She is a Ukrainian woman in her thirties.
“She is armed and dangerous, and thought to be in the company of accomplices,’ said the source. ‘She should be approached with extreme caution.”
CCTV footage showed the woman wearing a black bucket hat and long-sleeved fleeing on foot across the border to France, where there are no checkpoints.
It is believed that the suspect was headed for Beausoleil in France and has and has now made her way to Italy.
“She is armed and dangerous, and thought to be in the company of accomplices,” said the source.
“She should be approached with extreme caution.”
French and Monégasque judicial authorities have opened a criminal enquiry for attempted murder, the planting of an explosive device on a public road with criminal intent and criminal conspiracy.
Stéphane Thibault, the Monaco prosecutor who is leading the investigation in Monte Carlo, said: “We are attempting to arrest the suspect.”
